Practical software fixes, setup guides, and tool workflows.

Fix Chrome Certificate Error: Invalid Authority with Proxy Settings

You open Chrome and see NET::ERR_CERT_AUTHORITY_INVALID on every site, even trus...

Fix Nginx Upstream Connection Refused Error

When Nginx returns upstream connection refused in your error logs, it means Nginx tr...

Fix Windows Update Error 0x80070005 by Taking Ownership

What Causes Error 0x80070005?

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

Fixing Node Sass Build Failures on Linux

If you're running npm install on a Linux machine and get a build failure for

Fixing Cloudflare 522 Error: CDN Configuration Steps

If you see a 522 Connection Timed Out error from Cloudflare, it means your CDN (...

How to Reinstall Windows Security App (Microsoft Defender)

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