Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Outlook Version Mismatch Registry Error

You open Outlook and see an error about a version mismatch, or Outlook won't start because of a r...

Fix Windows Search 502 Bad Gateway Error

If you see a "502 Bad Gateway" error when using Windows Search (e.g., in File Explorer or the Sta...

Fix OneDrive Sync Module Not Found Registry Error

If you see an error like "OneDrive sync module not found" or a registry-related message when star...

Fix Nginx 502 Bad Gateway for WordPress

If you see a 502 Bad Gateway error when visiting your WordPress site running on Nginx, it usually...

Troubleshoot 504 Gateway Timeout in Windows Security App

When you open Windows Security (formerly Windows Defender Security Center) and see a 504 ...

How to Fix Windows Update Error 0x80070002 Stuck Downloading
If Windows Update gets stuck downloading with error 0x80070002, it usually means the update files...