Checklists for software errors, setup, and tool workflows.

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Fix DNS Probe Finished NXDOMAIN Caused by Antivirus Blocking

You try to load a website and see DNS_PROBE_FINISHED_NXDOMAIN in Chrome, or simi...

Fix Windows Update Error 0x80070002 on Windows 11

If you see error 0x80070002 when running Windows Update on Windows 11, it usually means Windows c...

Windows 11 Installation Assistant Not Completing Setup: Fixes

You launch the Windows 11 Installation Assistant, it runs for a while, then either stalls, throws...

How to Fix Cloudflare Error 521: Origin Server Unreachable

If you see Cloudflare error 521, your origin server is not responding to Cloudflare's request...

Windows Explorer Restarting Checklist for Advanced Users

If Windows Explorer (explorer.exe) keeps restarting—freezing, flashing, or crashing repeatedly—it...