Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome while running in Safe Mod...

If Windows Update won't start and you see an error like "Windows Update service is not ru...

If you see connect() failed (111: Connection refused) or connect() failed (13:...

Windows Explorer Not Responding? Here's How to Fix It
Windows Explorer (now called File Explorer) freezing or showing "not responding" is a com...

Fix Git Clone Connection Timed Out on GitHub Enterprise
When you run git clone on a GitHub Enterprise repository and see connection ti...

Fix Nginx Permission Denied for SSL Certificate Files
When nginx refuses to start or reload with a "permission denied" error related to an SSL ...