Checklists for software errors, setup, and tool workflows.

How to Fix Windows Security Not Responding

Windows Security (formerly Windows Defender Security Center) may stop responding, hang on launch,...

Fixing 504 Gateway Timeout from Windows Update with Proxy

If you see a "504 Gateway Timeout" error when running Windows Update, and your system uses a prox...

Fix Windows Store Error 0x80073cf9: Clear Cache & Repair

You try to install or update an app from the Microsoft Store, and you get error 0x80073cf9. Usual...

Windows Update DNS Error: Practical Troubleshooting Checklist

When Windows Update fails with a DNS error, it usually means your PC can't resolve the domain nam...

Fix Windows Defender Can't Connect to Microsoft Server

When Windows Defender shows 'Can't connect to Microsoft server', it usually means the antivirus c...

Fix Docker Build Error: 'failed to solve: manifest not found'

You run docker build and get an error like:

failed to solve: error fetching ...