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

Fix FFmpeg Audio Out of Sync in MP4 Files

If you've encoded an MP4 with FFmpeg and noticed the audio drifts out of sync—voice lagging behin...

Fix 'Microsoft Store Module Not Found' Error on Reinstall

When you try to reinstall an app from the Microsoft Store, you might see an error like "module no...

How to Fix Windows Update SSL Certificate Errors

When Windows Update fails with an SSL certificate error, you typically see messages like "A conne...

Fix Windows Update ‘Authentication Failed’ or ‘Password Incorrect’ Error

You try to check for Windows updates and see an error like “Authentication failed” or “Password i...

Fix Windows Defender Service Not Starting (Error 0x80070422)

You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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