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

OpenVPN Connection Failed: Check Firewall Settings

You see "connection failed" in your OpenVPN client log. The server is reachable, but the handshak...

Fix PowerShell 502 Bad Gateway After Windows Update

After a recent Windows update, you may encounter a 502 Bad Gateway error when using PowerShell to...

How to Fix Windows Defender Authentication Failed Error

If you see "Authentication failed" when opening Windows Defender or trying to run a scan, it usua...

Fix 'Remote Desktop Command Not Found' Error