
How to Reinstall the Windows Security App (Microsoft Defender)
If the Windows Security app (Microsoft Defender) is missing, won’t open, or shows errors, reinsta...
Software troubleshooting desk

If the Windows Security app (Microsoft Defender) is missing, won’t open, or shows errors, reinsta...

If you're stuck in a login loop in Windows Terminal — you type your password, the screen flashes,...

You might see a watermark saying your Windows activation has expired, even though you never enter...

You start a meeting, click Share, and nothing happens—or attendees see a black screen. This is a ...

You open Chrome and see the error message: “Profile service unavailable.” This usually means Chro...

If Chrome shows "ERR_PROXY_CONNECTION_FAILED" or similar proxy errors, you usually can't browse t...