
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...

You try to install or use a Chrome extension, but you see a 'permission denied' error. This usual...

When you try to run Windows Defender commands from Command Prompt and get a '404 Not Found' error...

If Outlook is using 90-100% CPU and becomes unresponsive or freezes, it's usually due to a corrup...

You open Microsoft Teams and see an error code related to a version mismatch. The app may refuse ...

If you're seeing a 404 error in Microsoft Teams—often when opening a chat, channel, or file—it's ...