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

How to Fix PowerShell Port Already Allocated Error

When you try to start a TCP listener or run a script that binds to a specific port in PowerShell,...

Fix OneDrive Sync Invalid Configuration Permission Denied

You open OneDrive and see an error like "Invalid configuration" or "Permission denied" when tryin...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...

SSH Host Key Verification Failed: Troubleshooting Checklist

When you connect to a remote server via SSH and see "WARNING: REMOTE HOST IDENTIFICATION HAS CHAN...

Fix Remote Desktop Rate Limit and Permission Denied Errors

You're working remotely, and suddenly your Remote Desktop client shows "Access denied" or "Rate l...

Fix Windows Defender Connection Refused via Registry

When Windows Defender shows a "connection refused" error, it usually means the Windows Security C...