Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

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Windows Defender Authentication Failed: Step-by-Step Checklist

You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED When Using VPN

You're browsing with Chrome and your VPN is on, but suddenly pages won't load and you see

Fix Chrome Profile 504 Gateway Timeout on One Specific Site

If you see a 504 Gateway Timeout error in Chrome only when visiting a particular website, the pro...

Fix Windows Search Indexing Service Won't Start

You open Task Manager or Services and see that the Windows Search service is stopped. When you tr...

Fix 'Running Scripts Is Disabled' Error in PowerShell

You try to run a PowerShell script and see: ...cannot be loaded because running scripts is ...

Windows Update Troubleshooting Checklist: Step by Step
Windows Update can fail for many reasons. This checklist walks you through the most common fixes,...