
How to Reinstall the Windows Security Module
If Windows Security won't open, shows errors, or you see "This app has been turned off" messages,...
Software troubleshooting desk

If Windows Security won't open, shows errors, or you see "This app has been turned off" messages,...

You’ve downloaded the Windows 10 offline installer for activation, but it won’t run, hangs, or gi...

If Windows Defender is disabled and you suspect a Group Policy setting is the cause, you may see ...

If you've set Cloudflare's 1.1.1.1 DNS on your Android device but websites won't load or you see ...

If you see an error like “Windows can’t activate right now” or “We can’t activate Wi...

If you've just unlocked a BitLocker-protected drive and suddenly your network stops working with ...