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

Fix 'Port Already in Use' Error When No Process Shows

You try to launch Chrome or a Chrome-based tool (like Puppeteer, Selenium, or a local dev server)...

Fix Windows 10 Error 0xc004c003: Invalid Product Key

You see error 0xc004c003 during Windows 10 activation, with a message that the product key is not...

Fix Outlook Blank Screen After Office Installation

Symptom and likely cause

After installing or updating Microsoft Office, Outlook may open ...

Fix 'Windows Update Command Not Found' on Windows 11

If you see 'Windows Update command not found' when running wuauclt or usoclien...