Fixing Windows Security Proxy Configuration Issues
When Windows Security (formerly Windows Defender Security Center) can't update virus definitions ...
Software comparisons, alternatives, and tool decision notes.
Fit
Decision
Migration
Latest comparisons
Browse labFix Task Scheduler 502 Bad Gateway Not Working
If you see a 502 Bad Gateway error when Task Scheduler runs a task that hits a web service or IIS...
Fix Chrome Profile Version Mismatch After Update
After updating Chrome, you might see a message like "Your profile cannot be used because it is fr...
Fix Windows Update 504 Gateway Timeout: Network Troubleshooting Guide
When Windows Update fails with a 504 Gateway Timeout error, it usually means the update server is...
Windows Defender 404 Not Found: How to Fix Missing Interface
You open Windows Security, click on Virus & threat protection, and get a blank page or a 404 erro...
How to Fix Windows Defender Real-Time Protection Stuck
Windows Defender’s real-time protection sometimes gets stuck—either refusing to turn on after bei...