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

Fix 'Port Already Allocated' Error in Windows Defender

You open Windows Defender Security Center or try to run a scan, and you see an error saying a por...

Chrome Proxy Error Troubleshooting Checklist

You're trying to browse but Chrome shows 'ERR_PROXY_CONNECTION_FAILED' or 'Unable to connect to t...

Fix Windows Security Authentication Failed Event ID 4625

If you're seeing Event ID 4625 in Windows Security logs, it means an account failed to log on. Th...

How to Fix Chrome SSL Certificate Error After Update

Fix Microsoft Store Not Opening After Windows Update

After a Windows update, the Microsoft Store may fail to open—clicking the icon does nothing, or i...

Fix Chrome 'Profile Connection Refused' Error on Mac

If you see 'Profile connection refused' when opening Chrome on your Mac, the browser can't access...