Checklists for software errors, setup, and tool workflows.

How to Re-enable IntelliSense in VS Code When It's Disabled

If IntelliSense suddenly stops working in Visual Studio Code—no suggestions pop up as you type, o...

How to Reinstall Windows Security App (Microsoft Defender)

If the Windows Security app (Microsoft Defender) is missing, crashing, or not opening, reinstalli...

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

How to Fix Firefox Secure Connection Failed Certificate Error

You see a full-page error in Firefox: Secure Connection Failed with a message li...

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...

How to Update Git Remote Origin URL

When a repository's remote URL changes—for example, after migrating to a new Git server or sw...