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

Chrome SSL Certificate Error: Troubleshooting Checklist

You're browsing in Chrome and see a warning like "Your connection is not private" or "NET::ERR_CE...

Fix Windows Defender Connection Refused or Permission Denied Errors

If you see "connection refused" or "permission denied" when trying to start or update Windows Def...

Fix High CPU Usage by Antivirus Scanning PowerShell

If you notice that PowerShell (powershell.exe or pwsh.exe) is using high CPU, and you have an ant...

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

Fix Windows Update Access Denied: Run as Administrator

You click 'Check for updates' in Windows Update, and instead of progress, you see an 'Access Deni...

Fix Windows Defender Module Not Found After Antivirus Uninstall

After uninstalling a third-party antivirus program, Windows Defender may fail to load its modules...