Computer is unable to go online either because of malware attack or a connectivity failure.

Cause:

The connectivity profile corrupt due to Malware or problem with internet connectivity settings.

Workaround:

• Check with IPCONFIG.
• Try to ping and check for valid IP address.
• Disable Antivirus or firewall.
• Check and start DHCP, DNS, RPC, Plug & Play and Network Connections services and check the 169.254.x.x or 0.0.0.0 IP address.
• If you still not getting a valid IP address then try winsock reset and reinstall TCP/IP. or
• You have got the valid IP address but it display this message could not find host . Now try to ping websites IP address.
• Force DNS (4.2.2.2 & 4.2.2.1)
• Power cycle modem.
• Release and renew IP address (IPCONFIG /RELEASE and IPCONFIG /RENEW)

Now you have got valid IP address and able to ping websites. But still unable to browse, then try to troubleshoot the browser.

• Try other browser if customer has one installed.
• Try IE optimization.
• Uncheck enable third party browser extensions
• Uncheck any proxy.
• Disable addons/ Try no addons mode.
• Check in safe mode with networking.
• Use Windows Explorer to browse instead.

 

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