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

Windows 11 Update Stuck at 0%? Here's How to Fix It

You click "Check for updates" and see the download sitting at 0% for minutes or hours. Th...

Clear Chrome Certificate Cache to Fix NET::ERR_CERT_AUTHORITY_INVALID

When you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome, it usually means the browser...

Fix Windows Update Error 0x80070005 by Taking Ownership

What Causes Error 0x80070005?

This error usually means Windows Update doesn't have pe...

Fixing Cloudflare 521 Error After Server Restart

You restart your server, wait for it to come back up, then visit your site—only to see a Cloudfla...

Fix Nginx Configuration Test Failure from Rewrite Rules

You run nginx -t and get an error. The log points to a rewrite rule. This is common ...

Fix Windows Update Error 0x80070002

Windows Update error 0x80070002 usually appears when the update process can't find a required...