Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Windows Activation Command Error 0x80070002

When you try to activate Windows using the command line—for example, running slmgr /ato

Fix Apache Not Starting: Port 80 Already in Use
When Apache fails to start with the error (98)Address already in use: AH00072: make_sock: c...

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 'npm command not found' on Linux
When you type npm in the terminal and get command not found, it usually...

Fix Windows Security Proxy Error Not Working
Windows Security may stop working with a proxy error, often due to misconfigured proxy settings o...

Fix Microsoft Store Offline Installer Setup Configuration Failed
When you download an offline installer from the Microsoft Store and try to run it, you might see ...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Windows Activation Command Error 0x80070002

Fix Apache Not Starting: Port 80 Already in Use

Fix Windows Security Service Not Starting

Fix 'npm command not found' on Linux

Fix Windows Security Proxy Error Not Working

Fix Microsoft Store Offline Installer Setup Configuration Failed

`Topic paths`

`Quick titles`