Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Windows Activation Version Mismatch Using slmgr

If you see an error like "The version of this file is not compatible with the version of Windows ...

Fix Windows Activation Stuck on 'Activating'

You see 'Activating' in Settings > System > Activation, but it never finishes. This is a common g...

How to Fix Windows Update Error 0x8024402c During Setup

You're trying to install a Windows feature update or run Windows Update during setup, and you see...

Fix Microsoft Teams Unable to Connect Due to Proxy Settings

If Microsoft Teams shows an error like "Can't connect" or "Something went wrong" and you suspect ...

Fix pip SSL Certificate Verify Failed Behind Proxy

When running pip install behind a corporate proxy, you may see an error like S...

Fix Windows Defender Port Already Allocated Registry Error
When Windows Defender fails to start or update, you might see an error like 'port already allocat...