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

Checklist for Troubleshooting Port Already Allocated on Windows

When you see 'port already allocated' or 'address already in use' on Windows, it means another pr...

Fix Remote Desktop Version Mismatch on Windows 10

When you try to connect to a remote PC using Remote Desktop (RDP) on Windows 10, you might see an...

Java JDK Not Recognized After Installation: Fixes and Checks

Fix Windows Update Authentication Failed for Domain Users

If you're a domain user and see "Authentication failed" when checking for Windows Updates, the is...

Fix Windows Defender Service Not Starting (Error 0x80070422)

You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...

Fix PuTTY Connection Refused After Server Restart

You restart your server, open PuTTY, and see "Connection refused". This is a com...