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

Jupyter Kernel Not Starting After Update: Fixes

After updating Jupyter or its dependencies, you might see the kernel die immediately or hang with...

Command Prompt Full System Restore Checklist

If your Windows system is unstable or won't boot, you might need a full system restore. Using Com...

Outlook File Locked: How to Unlock PST File

You try to open your Outlook data file (PST) and get an error that the file is locked, or Outlook...

Fix Putty Connection Refused on Port 22

You try to connect to a remote server with Putty on port 22, but you get 'Connection refused'. Th...

How to Fix Windows Update Access Denied Error in Command Prompt

Fix Chrome Tunnel Connection Failed Error

When you see "Tunnel connection failed" in Chrome, it usually means the browser couldn't establis...