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

Fixing Microsoft Teams Authentication Failed for Guest Users

When a guest user sees 'Authentication failed' in Microsoft Teams, they cannot sign in or access ...

Windows Defender Setup After a Fresh Install

After a fresh Windows install, Windows Defender (now called Microsoft Defender Antivirus) is typi...

Fix Windows Terminal File Locked Error – Quick Steps

If you see "cannot access file because it is locked" in Windows Terminal, it usually means anothe...

Fix OneDrive Sync Stuck on 404 Not Found Error

If your OneDrive sync is stuck and you see a 404 Not Found error, it usually means the sync engin...

Fix 'Windows Security Authentication Failed' for Domain Credentials

GitLab Runner Not Running Jobs: Troubleshooting Checklist

If your GitLab Runner shows as registered but never runs any jobs, or jobs stay stuck in 'pending...