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

Fix Command Prompt Service Unavailable on Windows 11

When you try to open Command Prompt on Windows 11 and see 'Service unavailable' or a blank window...

Fix Windows Update Error 0x80070005 (Access Denied)

When Windows Update fails with error code 0x80070005, it usually means the update service lacks n...

How to Fix Outlook Rate Limit Error in Office 365

Understanding the Error

You may see a message like "Too many requests" or "Server busy" ...

Fix Windows Activation Service Unavailable Without Product Key

You see 'Windows activation service unavailable' and you don't have the product key. This usually...

MySQL Connection Refused on Port 3306: Causes and Fixes

If you're seeing "connection refused" when trying to connect to MySQL on port 3306, the MySQL ser...

How to Fix 'File Locked by System' in Windows Defender

If you see an error like "File locked by system" when running a Windows Defender scan or trying t...