Knowledge base for software setup, errors, and daily tool work.

Fix Windows Defender High Memory Usage in Windows 11

You open Task Manager and see Windows Defender (Microsoft Defender Antivirus) using 500 MB or mor...

UFW Port Closed Despite Allow Rule: Fixes

You've added a UFW allow rule for a port, but a port scan or service test shows the port is still...

How to Fix Windows Defender Cache Not Clearing

If you've noticed that Windows Defender isn't releasing disk space after a scan or that the cache...

How to Clear a Stuck OneDrive Sync Queue

OneDrive sync can get stuck when files fail to upload or download, leaving a queue that won't cle...

Fix Command Prompt Sync Issue with System Clock

Fix Windows Defender Rate Limit Error Not Working

If you see a 'rate limit error' in Windows Defender and it's not working properly—scanning fails,...