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

Fix Windows Activation Error After Clean Boot

You've performed a clean boot to troubleshoot a problem, and now Windows reports an activation er...

How to Remove a Host Key from SSH Known Hosts

SSH warns or fails when a remote host's key changes—common after server rebuilds, IP reassignment...

Fix Windows Activation Download Failed on Mac Boot Camp

You've installed Windows on your Mac via Boot Camp, but when you try to activate it, you see an e...

Fix PowerShell Proxy Authentication Failed Errors

Windows Search 502 Bad Gateway: Troubleshooting Checklist

When Windows Search returns a 502 Bad Gateway error, it usually means the search service or its d...

OBS Black Screen Troubleshooting Checklist

You launch OBS Studio, start a scene, and the preview shows a black screen. This is one of the mo...