
How to Enable Windows Defender After It Failed to Start
If Windows Defender won't start, you may see an error like "This app has been turned off" or "Win...
Software troubleshooting desk

If Windows Defender won't start, you may see an error like "This app has been turned off" or "Win...

If Windows Defender keeps asking you to sign in repeatedly—even in Safe Mode—the problem is usual...

When you see error 0x80070422 in Windows Defender, the Security Center service or Windows Update ...

You connect to a remote PC via Remote Desktop (RDP), but there's no sound—no system alerts, no me...

If you see SSL certificate verify failed when running commands in Command Prompt, it...

When a service fails to start or an application complains that a port is already in use, you need...