Checklists for software errors, setup, and tool workflows.

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How to Fix Windows Update Invalid Configuration Registry Error

You may see an error like 'Windows Update encountered an error – 0x80070002' or 'Invalid configur...

Fix Jupyter Notebook Token Not Working on Localhost

If you see a token prompt when opening Jupyter Notebook on localhost, and entering the token fail...

Checklist for Fixing Windows Security Startup Failure

When Windows Security (formerly Windows Defender) fails to start at boot, you may see an error li...

Fix Windows Update Service After Antivirus Install

You installed a new antivirus program, and now Windows Update won't run. The service might be dis...

Fix SSL Certificate Error When Using cURL in Command Prompt

When you run a cURL command in Windows Command Prompt and see an error like SSL certificate...

Fix Windows Update 502 Bad Gateway Connection Issue
When Windows Update fails with a "502 Bad Gateway" error, it usually means the update server can'...