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

Fix Windows Defender Real-Time Protection Not Running

You open Windows Security and see a yellow warning: "Real-time protection is off." Or you...

Fix Cloudflare Wildcard Subdomain SSL Not Working

You set up a wildcard SSL certificate for your domain on Cloudflare, but some subdomains still sh...

How to Fix Windows Explorer Error 0xc0000005 on Restart

If Windows Explorer keeps restarting and you see error 0xc0000005, it usually means a critical pr...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix Firefox Secure Connection Failed Due to Proxy Settings

If you see "Secure Connection Failed" in Firefox and suspect a proxy is involved, you'...

Fix Chrome Black Screen on Mac: Hardware Acceleration Issue

You open Chrome on your Mac, and the screen goes black—or parts of the page are garbled. This oft...