Checklists for software errors, setup, and tool workflows.

Fix Nginx Upstream Connection Refused Behind Cloudflare

If you see upstream connection refused in your Nginx error logs while using Cloudfla...

Fix Windows Update Service Not Running After Clean Boot

If you performed a clean boot to troubleshoot an issue and later found that Windows Update won...

Fix VS Code IntelliSense Not Showing Suggestions

You're typing code in VS Code, expecting autocomplete suggestions, but nothing appears. This ...

Fix DNS Probe Finished NXDOMAIN on Custom DNS Server

If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...

Fixing Cloudflare 521 Error: Enable Origin Pull Setup

If you see a Cloudflare 521 error, it means Cloudflare can't connect to your origin server. O...

Git Fatal: Refusing to Merge Unrelated Histories – Workaround

You try to merge two Git branches and get this error:

fatal: refusing to merge unre...