Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Windows Search 502 Bad Gateway After Update

After a recent Windows Update, you might see a “502 Bad Gateway” error when using Windows Search....

How to Fix Windows Defender Update Stuck Error

When Windows Defender gets stuck downloading or installing updates, you might see an error like “...

Fix Microsoft Teams Guest Access Denied Error

You've been invited to a Microsoft Teams team as a guest, but when you try to join, you see an "A...

Fix OneDrive Update Error Without Reinstalling

You try to update OneDrive but get an error message. Reinstalling might fix it, but that means lo...

How to Fix 504 Gateway Timeout in CMD Proxy Setup

You're running a command-line tool behind a corporate proxy and get a 504 Gateway Timeout

Fix Windows Defender Antivirus Permission Denied Error
You try to start Windows Defender Antivirus and get a “permission denied” error. This typically h...