{"id":54955,"date":"2024-11-25T10:36:30","date_gmt":"2024-11-25T03:36:30","guid":{"rendered":"https:\/\/itsystems.vn\/how-to-fix-computer-network\/"},"modified":"2026-07-29T11:27:41","modified_gmt":"2026-07-29T04:27:41","slug":"how-to-fix-computer-network","status":"publish","type":"post","link":"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/","title":{"rendered":"How to fix computer network"},"content":{"rendered":"<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">If your computer cannot access the network (including WiFi and wired network), you have the following ways to fix your computer network:<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">The content of the article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#1_Check_basic_connections\" >1. Check basic connections<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#2_Check_network_status_on_computer\" >2. Check network status on computer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#3_Reset_IP_address\" >3. Reset IP address<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#4_Check_network_driver\" >4. Check network driver<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#5_Check_firewall_and_anti-virus_software_settings\" >5. Check firewall and anti-virus software settings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#6_Reset_network_settings\" >6. Reset network settings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#7_Check_hardware\" >7. Check hardware<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#8_Contact_your_internet_service_provider_ISP\" >8. Contact your internet service provider (ISP)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#9_If_still_not_working\" >9. If still not working<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#Related_services_from_IT_Systems\" >Related services from IT Systems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#FAQ\" >FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#When_should_a_business_ask_IT_Systems_for_support\" >When should a business ask IT Systems for support?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#Can_IT_Systems_help_review_the_current_environment_before_proposing_a_solution\" >Can IT Systems help review the current environment before proposing a solution?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#Does_this_topic_connect_to_ongoing_IT_operations\" >Does this topic connect to ongoing IT operations?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/itsystems.vn\/en\/how-to-fix-computer-network\/#Need_help_applying_this_to_your_business\" >Need help applying this to your business?<\/a><\/li><\/ul><\/nav><\/div>\n<h3 style=\"text-align: left; padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"1_Check_basic_connections\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><br \/>\n<\/span><strong style=\"font-family: 'times new roman', times, serif;\"><b>1. Check basic connections<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Check network cable (for wired network):<\/b><\/strong><\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Make sure the network cable is securely plugged into the Ethernet port on your computer and modem\/router.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54791\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-2.jpg\" alt=\"|\" width=\"359\" height=\"255\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-2.jpg 800w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-2-300x213.jpg 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-2-768x545.jpg 768w\" sizes=\"auto, (max-width: 359px) 100vw, 359px\" \/><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">Try plugging the cable into another device (like another laptop) to check if the cable is damaged.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54792\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-7.jpg\" alt=\"|\" width=\"360\" height=\"256\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-7.jpg 800w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-7-300x213.jpg 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/cach-ket-noi-mang-co-day-ethernet-voi-laptop-windows-10-7-768x545.jpg 768w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Check WiFi signal (for wireless network):<\/b><\/strong><\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Make sure you are within WiFi range of your router.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54796\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-084712.png\" alt=\"|\" width=\"231\" height=\"269\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-084712.png 470w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-084712-258x300.png 258w\" sizes=\"auto, (max-width: 231px) 100vw, 231px\" \/><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">Check to see if other devices are connecting. If not, the problem may be with the router. <\/span><\/li>\n<\/ul>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Restart modem\/router:<\/b><\/strong><\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Turn off the modem\/router, wait 1-2 minutes, then turn it back on.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54793\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/co-can-thiet-phai-tat-modem-wifi-moi-ngay-nhieu-nguoi-hoi-han-khi-biet-cau-tra-loi-collage-1720500782-373-width660height439.jpg\" alt=\"|\" width=\"388\" height=\"258\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/co-can-thiet-phai-tat-modem-wifi-moi-ngay-nhieu-nguoi-hoi-han-khi-biet-cau-tra-loi-collage-1720500782-373-width660height439.jpg 660w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/co-can-thiet-phai-tat-modem-wifi-moi-ngay-nhieu-nguoi-hoi-han-khi-biet-cau-tra-loi-collage-1720500782-373-width660height439-300x200.jpg 300w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><\/p>\n<h3 style=\"padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"2_Check_network_status_on_computer\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><strong><b>2. Check network status on computer<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Check network icon:<\/b><\/strong><\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">If the network icon has a yellow exclamation mark or a red &#8220;X&#8221;:<\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Right click on the icon&gt; Select <strong><b>Troubleshoot problems<\/b><\/strong> to let Windows automatically fix the error.  <\/span><span style=\"font-family: 'times new roman', times, serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54795\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/khac-phuc-loi-khi-phat-wifi-tren-windows-8-81-va-4-800x350-1.jpeg\" alt=\"|\" width=\"395\" height=\"173\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/khac-phuc-loi-khi-phat-wifi-tren-windows-8-81-va-4-800x350-1.jpeg 800w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/khac-phuc-loi-khi-phat-wifi-tren-windows-8-81-va-4-800x350-1-300x131.jpeg 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/khac-phuc-loi-khi-phat-wifi-tren-windows-8-81-va-4-800x350-1-768x336.jpeg 768w\" sizes=\"auto, (max-width: 395px) 100vw, 395px\" \/>     <\/span><\/li>\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Check network settings:<\/b><\/strong><\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-family: 'times new roman', times, serif;\">  Press <strong><b>Windows + R<\/b><\/strong> , type ncpa.cpl and press Enter.<\/span><\/p>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54798\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111113.png\" alt=\"|\" width=\"383\" height=\"279\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111113.png 481w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111113-300x218.png 300w\" sizes=\"auto, (max-width: 383px) 100vw, 383px\" \/><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">  Check the status of your network connection:<\/span><\/p>\n<ul style=\"text-align: left;\">\n<li style=\"list-style-type: none;\">\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">If the connection is disabled, right-click and select <strong><b>Enable<\/b><\/strong> .<\/span><\/li>\n<li><span style=\"font-family: 'times new roman', times, serif;\">If you don&#8217;t see a network connection, your network card may be faulty.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 style=\"text-align: left; padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"3_Reset_IP_address\"><\/span><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54797\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-090605.png\" alt=\"|\" width=\"647\" height=\"226\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-090605.png 1408w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-090605-300x105.png 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-090605-1024x358.png 1024w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-090605-768x268.png 768w\" sizes=\"auto, (max-width: 647px) 100vw, 647px\" \/><strong style=\"font-family: 'times new roman', times, serif;\"><b>3. Reset IP address<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">Open <strong><b>Command Prompt<\/b><\/strong> (CMD) as Administrator, then enter the following commands in turn:<\/span><\/p>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54799\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111221.png\" alt=\"|\" width=\"598\" height=\"296\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111221.png 943w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111221-300x149.png 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-111221-768x380.png 768w\" sizes=\"auto, (max-width: 598px) 100vw, 598px\" \/><\/p>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">netsh int ip reset<\/span><\/p>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">ipconfig \/release<\/span><\/p>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">ipconfig \/renew<\/span><\/p>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">ipconfig \/flushdns<\/span><\/p>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">Restart your computer after doing this.<\/span><\/p>\n<h3 style=\"text-align: left; padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"4_Check_network_driver\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><br \/>\n<\/span><strong style=\"font-family: 'times new roman', times, serif;\"><b>4. Check network driver<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">Right click on <strong><b>This PC\/My Computer<\/b><\/strong>&gt; <strong><b>Manage<\/b><\/strong>&gt; <strong><b>Device Manager<\/b><\/strong> .<\/span><\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-54794 aligncenter\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Device-Manager-4.jpg\" alt=\"|\" width=\"502\" height=\"282\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Device-Manager-4.jpg 800w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Device-Manager-4-300x169.jpg 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Device-Manager-4-768x432.jpg 768w\" sizes=\"auto, (max-width: 502px) 100vw, 502px\" \/><\/p>\n<ol style=\"text-align: left;\" start=\"2\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">Expand the <strong><b>Network Adapters<\/b><\/strong> item.<\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">If you see a yellow warning icon, your network driver may be faulty.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Right click on the network card&gt; Select <strong><b>Update driver<\/b><\/strong> .<\/span><\/li>\n<\/ol>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54800\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113824.png\" alt=\"|\" width=\"479\" height=\"373\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113824.png 947w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113824-300x233.png 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113824-768x598.png 768w\" sizes=\"auto, (max-width: 479px) 100vw, 479px\" \/><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">If that doesn&#8217;t work, select <strong><b>Uninstall device<\/b><\/strong> and restart your computer to let Windows automatically reinstall the driver.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54801\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113825.png\" alt=\"|\" width=\"504\" height=\"393\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113825.png 947w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113825-300x233.png 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Screenshot-2024-11-18-113825-768x598.png 768w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"5_Check_firewall_and_anti-virus_software_settings\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><strong><b>5. Check firewall and anti-virus software settings<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Temporarily disable firewall:<\/b><\/strong><\/span>\n<ol>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Go to <strong><b>Control Panel<\/b><\/strong>&gt; <strong><b>System and Security<\/b><\/strong>&gt; <strong><b>Windows Defender Firewall<\/b><\/strong> .<\/span><\/li>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Select <strong><b>Turn Windows Defender Firewall on or off<\/b><\/strong> and turn off both options.<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<p style=\"text-align: left;\"><span style=\"font-family: 'times new roman', times, serif;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-54787\" src=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Picture9-1.png\" alt=\"|\" width=\"502\" height=\"333\" title=\"\" srcset=\"https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Picture9-1.png 780w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Picture9-1-300x199.png 300w, https:\/\/itsystems.vn\/wp-content\/uploads\/2024\/11\/Picture9-1-768x510.png 768w\" sizes=\"auto, (max-width: 502px) 100vw, 502px\" \/><\/span><\/p>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Check antivirus software:<\/b><\/strong><\/span><\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">Some anti-virus software may block network connections. Temporarily disable them to check. <\/span><\/p>\n<h3 style=\"padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"6_Reset_network_settings\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><br \/>\n<\/span><strong style=\"font-family: 'times new roman', times, serif;\"><b>6. Reset network settings<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">Go to <strong><b>Settings<\/b><\/strong>&gt; <strong><b>Network &amp; Internet<\/b><\/strong>&gt; <strong><b>Advanced network settings<\/b><\/strong> .<\/span><\/li>\n<li><span style=\"font-family: 'times new roman', times, serif;\">Scroll down and select <strong><b>Network reset<\/b><\/strong> .<\/span><\/li>\n<\/ol>\n<p style=\"text-align: left;\"><span style=\"font-family: 'times new roman', times, serif;\">  Select reset now<\/span><\/p>\n<ol style=\"text-align: left;\" start=\"3\">\n<li><span style=\"font-family: 'times new roman', times, serif;\">Restart your computer.<br \/>\n<\/span><\/li>\n<\/ol>\n<h3 style=\"padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"7_Check_hardware\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><strong><b>7. Check hardware<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"text-align: left;\">\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Wired network:<\/b><\/strong><\/span>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif;\">The Ethernet port on your computer may be faulty. Try using a USB Ethernet Adapter. <\/span><\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-family: 'times new roman', times, serif;\"><b><\/b><strong><b>Wireless network:<\/b><\/strong><\/span><\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">If the WiFi card is faulty, you can replace it with a USB WiFi adapter.<\/span><\/p>\n<h3 style=\"padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"8_Contact_your_internet_service_provider_ISP\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><br \/>\n<\/span><strong style=\"font-family: 'times new roman', times, serif;\"><b>8. Contact your internet service provider (ISP)<\/b><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">If other devices cannot access the network, contact your ISP to check your internet connection status.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"padding-left: 40px;\"><span class=\"ez-toc-section\" id=\"9_If_still_not_working\"><\/span><span style=\"font-family: 'times new roman', times, serif;\"><strong><b>9. If still not working<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">Take your computer to a repair center for more detailed testing. It is possible that your network card or operating system has a serious error. <\/span><\/p>\n<p style=\"text-align: left; padding-left: 40px;\"><span style=\"font-family: 'times new roman', times, serif;\">Good luck in fixing the error!<\/span><\/p>\n<p style=\"text-align: left;\">\n<p><!-- its-deep-aio-en-related-2026-07-27 --><\/p>\n<section class=\"its-deep-aio-related\" aria-label=\"Related IT Systems services\">\n<h2><span class=\"ez-toc-section\" id=\"Related_services_from_IT_Systems\"><\/span>Related services from IT Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If your team is dealing with this issue in a live business environment, these services can help you move from diagnosis to a stable operating process.<\/p>\n<ul>\n<li><a href=\"https:\/\/itsystems.vn\/en\/microsoft-business-licensing\/microsoft-windows-licensing\/\">Windows licensing for business<\/a><\/li>\n<li><a href=\"https:\/\/itsystems.vn\/en\/microsoft-business-licensing\/windows-license-pricing\/\">Windows license pricing<\/a><\/li>\n<li><a href=\"https:\/\/itsystems.vn\/en\/it-services-for-businesses\/it-support-services\/\">IT support services<\/a><\/li>\n<\/ul>\n<\/section>\n<p><!-- its-deep-aio-en-faq-2026-07-27 --><\/p>\n<section class=\"its-deep-aio-faq\" aria-label=\"Frequently asked questions\">\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"When_should_a_business_ask_IT_Systems_for_support\"><\/span>When should a business ask IT Systems for support?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ask for support when the issue affects users, business data, security, licensing compliance, service availability or daily operations. A short technical review often prevents repeated incidents and hidden costs.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_IT_Systems_help_review_the_current_environment_before_proposing_a_solution\"><\/span>Can IT Systems help review the current environment before proposing a solution?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes. IT Systems can review the current setup, identify risks, map the issue to the right service scope and recommend a practical next step for your business.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Does_this_topic_connect_to_ongoing_IT_operations\"><\/span>Does this topic connect to ongoing IT operations?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In most cases, yes. Problems around software, cloud, endpoint, network, backup or security should be connected to a broader IT operations plan instead of being handled as isolated incidents.<\/p>\n<\/section>\n<p><!-- its-deep-aio-en-cta-2026-07-27 --><\/p>\n<section class=\"its-deep-aio-cta\" aria-label=\"Contact IT Systems\">\n<h2><span class=\"ez-toc-section\" id=\"Need_help_applying_this_to_your_business\"><\/span>Need help applying this to your business?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT Systems Vietnam can help assess the issue, recommend the right service path and support implementation for your team.<\/p>\n<p><a class=\"button\" href=\"https:\/\/itsystems.vn\/en\/contact-it-systems-vietnam\/\">Contact IT Systems<\/a> <a class=\"button\" href=\"https:\/\/itsystems.vn\/en\/it-services-for-businesses\/it-support-services\/\">View IT support services<\/a><\/p>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>If your computer cannot access the network (including WiFi and wired network), you have the following ways to fix your computer network: 1. Check basic connections Check network cable (for wired network): Make sure the network cable is securely plugged into the Ethernet port on your computer and modem\/router. Try plugging the cable into another [&hellip;]<\/p>\n","protected":false},"author":42,"featured_media":54791,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_focus_keyword":"How to fix computer network","rank_math_title":"","rank_math_description":"","rank_math_robots":"","rank_math_canonical_url":"","rank_math_schema":"","footnotes":""},"categories":[1344],"tags":[],"class_list":["post-54955","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-en"],"wpml_current_locale":"en_US","wpml_translations":{"vi_VN":{"locale":"vi_VN","id":54938,"slug":"cach-sua-mang-may-tinh","post_title":"C\u00e1ch s\u1eeda m\u1ea1ng m\u00e1y t\u00ednh","href":"https:\/\/itsystems.vn\/cach-sua-mang-may-tinh\/"}},"_links":{"self":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts\/54955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/users\/42"}],"replies":[{"embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/comments?post=54955"}],"version-history":[{"count":2,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts\/54955\/revisions"}],"predecessor-version":[{"id":85897,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/posts\/54955\/revisions\/85897"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/media\/54791"}],"wp:attachment":[{"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/media?parent=54955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/categories?post=54955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itsystems.vn\/en\/wp-json\/wp\/v2\/tags?post=54955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}