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

Enable Windows Security Manually When It Fails to Start

If Windows Security (formerly Windows Defender) fails to start, you may see an error like "This a...

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED When Using VPN

Fix Microsoft Teams Mic Not Working with External Microphone

You plug in an external microphone, but Microsoft Teams still won't pick up your voice. This is a...

Fix Windows Update Token Expired Permission Denied

If you see a Windows Update error saying "token expired" or "permission denied," it usually means...

npm Command Not Found: Troubleshooting Checklist

You type npm install and get npm: command not found. This typically mea...

Command Prompt Stopped Working: How to Reset It

When Command Prompt stops opening or crashes immediately, it's usually due to corrupted system fi...