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

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...

Stop Command Prompt High CPU Usage When Idle

You open Task Manager and see Command Prompt (cmd.exe) using 20-40% CPU, even though no windows a...

Fix Windows Activation Proxy Error After Network Change

After changing networks—moving offices, switching ISPs, or reconfiguring a VPN—you might see a Wi...

Fix Windows Defender High CPU Usage in Windows 10

If you notice your PC slowing down and the fan spinning up, Windows Defender might be using more ...

Windows Security Antivirus Configuration for Beginners

Windows Security (formerly Windows Defender) is the built-in antivirus in Windows 10 and 11. For ...

Fix SSH Permission Denied (publickey) on Raspberry Pi