Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix 'Service Unavailable' for PowerShell on Windows 10

You open PowerShell on Windows 10 and see an error like "Service Unavailable" or "PowerShell is n...

How to Fix Windows Update Error 404 Not Found

You see error 404 when checking for updates in Windows Update. This usually means the update serv...

Fix Windows Activation Blank Screen After Login

You log into Windows, but instead of your desktop, you see a blank screen—often with only a curso...

Fix Windows Security Not Starting Due to Third-Party Antivirus

If Windows Security (formerly Windows Defender) refuses to start or shows a blank screen, a third...

Fixing NGINX 502 Bad Gateway Permission Denied

If you're seeing a 502 Bad Gateway error from NGINX and the logs mention p...

How to Fix Microsoft Teams Connection Refused Error
When Microsoft Teams shows a 'connection refused' error, it usually means the app can't reach its...