Checklists for software errors, setup, and tool workflows.

Fix 'Token Expired' in Microsoft Teams Without Reinstalling

You're in a meeting, or trying to sign in, and Microsoft Teams says your token has expired. The k...

Fix 'npm command not found' Error in Ubuntu Terminal

When you type npm in the Ubuntu terminal and get npm: command not found...

GitHub Actions Workflow Fails With No Error Message

You run a GitHub Actions workflow, it fails, but the log shows no error message—just a red X. Thi...

Fix Windows Update Proxy Errors After Network Change

If you recently switched networks—say, from a corporate VPN to a home Wi-Fi—and Windows Update no...

Fix Ubuntu apt update GPG missing key error

When running sudo apt update, you might see an error like:

The following sig...

Reset Windows Security App Without Losing Data

If the Windows Security app is crashing, not opening, or showing errors, resetting it can often f...