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

Windows Security 502 Bad Gateway: Troubleshooting Checklist

If you see a 502 Bad Gateway error when opening Windows Security, it usually means the app can't ...

Fix Command Prompt Service Unavailable Error

When you open Command Prompt and see 'Service unavailable' or 'The requested service is unavailab...

Fix Windows Security Version Mismatch Error

You open Windows Security and see an error like "Version mismatch" or "This app can't open becaus...

Fix BitLocker Auto-Unlock Not Working via Group Policy

You've enabled BitLocker auto-unlock on a drive, but it still asks for the password every time yo...

Fix Chrome SSL Certificate Error: Invalid Common Name