Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Outlook 502 Bad Gateway Error from Proxy Settings

When Outlook displays a 502 bad gateway error, it usually means a proxy server is interfering wit...

Fix Python pip SSL Certificate Verify Failed Error

When using pip to install Python packages, you may encounter an SSL certificate verification erro...

Fix Microsoft Teams Internet Connectivity Check Not Working

You open Microsoft Teams and see a message that you're offline or that Teams can't verify your in...

Fix Windows Security Service Not Running for Antivirus

If Windows Security shows 'Service not running' or your antivirus isn't working, the underlying s...

Fix Postman SSL Certificate Errors on macOS

If you see an error like Error: unable to verify the first certificate or SSL ...

SSL Certificate Error in Windows Defender: Troubleshooting Checklist
If you see an SSL certificate error when Windows Defender tries to update or scan, it usually poi...