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

Fix Windows 10 Product Key Not Working After Hardware Change

You replaced a major component—often the motherboard—and now Windows 10 says your product key isn...

Fix 504 Gateway Timeout in Command Prompt

If you see a 504 Gateway Timeout error, it usually means a server upstream (like a proxy or gatew...

FFmpeg Video and Audio Out of Sync: Practical Fixes

You encoded a video with FFmpeg and now the audio drifts or is completely out of sync. This is a ...

How to Fix Windows Activation SSL Certificate Error

If you see an error like "SSL certificate problem" or "There was a problem with the activation se...

Where Nginx Logs 404 Errors: Location & Troubleshooting

When nginx returns a 404 Not Found, the first step is checking the error logs. This article cover...

Fix Windows Security Authentication Error 0x80070035