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

Fix Chrome Tunnel Connection Failed: Network Config Guide

When Chrome shows 'tunnel connection failed' or 'ERR_TUNNEL_CONNECTION_FAILED', it usually means ...

Fix Chrome Profile 502 Bad Gateway on Mac

If you see a "502 Bad Gateway" error in Chrome on your Mac, especially after a crash or update, i...

Fix Windows Security Module Not Found in Windows 11

You open Windows Security and see 'Windows Security module not found' or the app fails to launch....

Fix Windows Activation Error 0x800704cf: Cannot Connect to Server

You see error 0x800704cf when trying to activate Windows, with the message "Cannot connect to the...

Windows Update High CPU Usage Troubleshooting Checklist