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 Security DNS Error Using Command Prompt

If you see a DNS error in Windows Security (like "DNS server not responding" or "DNS resolution f...

How to Fix PowerShell Version Mismatch Error

Fix Microsoft Store 'Service Unavailable' Error on Windows 11

When you open Microsoft Store on Windows 11 and see a 'Service Unavailable' message, it usually m...

How to Fix BitLocker Recovery Key Not Accepted

You've entered the 48-digit recovery key, but Windows says it's not accepted. This is a frustrati...

How to Fix Windows Activation Service Not Running or Disabled

If you see an error that the Windows Activation Service is not running or disabled, it usually me...