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

Passing Environment Variables to Docker Compose: A Practical Guide

When you run a multi-container application with Docker Compose, you often need to configure servi...

Windows Update Error 0x800f081f: Troubleshooting Steps

You're running Windows Update and it fails with error 0x800f081f. This usually means the upda...

Fix VSCode Git Authentication Failed SSH Key Error

You try to push or pull in VSCode and get Git: authentication failed even though you...

Fix Cloudflare Origin Certificate with Let's Encrypt

If your origin server is rejecting the Cloudflare origin certificate—perhaps because of a SAN mis...

Fix Discord Black Screen from Chrome Hardware Acceleration

Why Chrome Hardware Acceleration Causes Discord Black Screen

When Chrome uses hardware a...

Fix Python venv Not Activating in CMD

You create a virtual environment with python -m venv myenv, navigate to the Scripts ...