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 Git 'refusing to merge unrelated histories' Error

When you try to merge two Git branches that don't share a common commit history, Git stops wi...

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...

Chrome Extensions Not Loading on Windows 10: Quick Fixes

If your Chrome extensions suddenly stop loading or appear grayed out on Windows 10, it's usua...

Cloudflare DNS Not Propagating After SSL Certificate Change

You changed an SSL certificate in Cloudflare, but DNS changes aren't showing up. This is a co...

Fix Chrome Certificate Error Due to Antivirus Interference

You're browsing in Chrome and suddenly see a red warning: Your connection is not priv...