Checklists for software errors, setup, and tool workflows.

Fix PowerShell Service Unavailable After Update

After a Windows update, you might see errors like "Service Unavailable" when trying to launch Pow...

Cloudflare Error 521: Web Server Is Down Checklist

If you see Cloudflare error 521 (web server is down), it means Cloudflare cannot establish a TCP ...

Fix Microsoft Store Proxy Error: Cannot Connect

When you open Microsoft Store and see “Cannot connect” or a proxy error, it usually means the app...

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

You run docker build and get an error like:

failed to solve: error fetching ...

How to Fix PowerShell Token Expired in Pipeline

When running PowerShell scripts in a CI/CD pipeline (Azure DevOps, GitHub Actions, Jenkins), you ...

Fix Microsoft Teams Port Already Allocated Error

You launch Microsoft Teams and see an error: 'port already allocated'. This usually means another...