Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Microsoft Teams 502 Bad Gateway Due to Network Config

You open Microsoft Teams and see a 502 Bad Gateway error. This usually means you...

Fix Windows Security Service Not Starting

You open Windows Security and see an error that the service isn't running. Or you get a notificat...

Fix Windows Defender Security Center Module Missing Error

You open Windows Security and see a blank page or an error saying the security center module is m...

Fix Windows Store Error 0x80073cf9 During Installation

Windows Store error 0x80073cf9 typically appears when you try to install or update a...

Fix Windows Security Authentication Failed Network Path Not Found

You try to access a shared folder or network drive and get: "Windows Security - Authenticatio...

Fix Windows Defender Token Expired Error in Command Prompt
When you run Windows Defender commands in Command Prompt as an administrator, you might see an er...