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

Create a New Firefox Profile When Your Old One Goes Missing

If Firefox fails to start or you see a message that your profile is missing, it's often due to a ...

Fix 7-Zip 'Cannot Open File' Error When Repairing Archives

When you try to repair a corrupted archive with 7-Zip and get a “Cannot open file” error, it usua...

Fix ERR_CONNECTION_RESET on Chrome Mobile

When browsing on your phone, Chrome may suddenly show "ERR_CONNECTION_RESET" and refuse to load a...

Cloudflare 521 Error: Origin Server Unreachable – Fixes

When you see a 521 error in your browser, Cloudflare is telling you it can't rea...

Fix 'ffmpeg command not found' in PHP exec()