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Wired and wireless network connection problems in Windows - Microsoft Windows Help
Troubleshoot wireless (Wi-Fi) and wired (Ethernet/LAN) network connection problems and Internet connectivity issues in Windows 8, Windows RT, Windows 7, Windows Vista, or Windows XP.
Set up a wireless router - Microsoft Windows Help
Follow these steps to set up your wireless router and create a wireless network.
Why can’t I connect to the Internet?
Learn how to solve common problems with Internet connections.
Fix Internet Explorer add-on problems when IE hangs or freezes
Automatically troubleshoot Internet Explorer problems when the browser crashes, freezes, hangs or stops responding caused by IE browser add-ons.
Diagnose and fix Windows Firewall service problems automatically
Automatically repair Windows Firewall problems, such as Windows fails to start Windows Firewall service (0x5) or Windows remote assistance is not working.