Knowledge base for software setup, errors, and daily tool work.

How to Fix Cloudflare 521 Error with Wildcard Subdomains

If you're seeing a Cloudflare 521 error on a wildcard subdomain (e.g., *.example.com), the or...

Fix Windows Defender Real-Time Protection Configuration Error

You open Windows Security and see a message that real-time protection is turned off or has a conf...

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

Symptom

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

Windows 11 Installation Assistant Stuck at 99%: How to Reset and Finish

You're upgrading to Windows 11 using the Installation Assistant, and it gets stuck at 99% for...

Taskbar Icons Missing After Windows Update: How to Restore Them

After a recent Windows update, you might notice that some or all taskbar icons have disappeared. ...

Fix Cloudflare Wildcard Subdomain Origin Server Errors

You set up a wildcard DNS record in Cloudflare (e.g., *.example.com) pointing to you...