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

Fix Windows Terminal 'File Locked by System' Error

When you try to open or edit a file in Windows Terminal and see "The file is locked by the system...

Fix VirtualBox Kernel Driver Not Installed on Mac

When you see "VirtualBox kernel driver not installed" on a Mac, it usually means...

Fix Windows Defender Proxy Error Not Working

You launch Windows Defender Security Center or try to run a scan, and you see a proxy error—somet...

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

Microsoft Store Not Working: How to Repair and Reinstall

You click the Microsoft Store icon, but nothing happens—or it opens briefly and crashes. Maybe yo...

Fix OBS Black Screen and Permission Denied on Windows 11

You launch OBS Studio on Windows 11, add a display capture or game capture source, and see only a...