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

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Firefox Secure Connection Failed on All Websites: Fix Guide

If Firefox shows 'Secure Connection Failed' on every website you try to visit, it usually...

Fix Discord Black Screen from Chrome Hardware Acceleration

Why Chrome Hardware Acceleration Causes Discord Black Screen

When Chrome uses hardware a...

Chrome Startup Crash When Opened from Task Manager

You click 'Run new task' in Task Manager, type 'chrome', hit Enter, and Chrome cr...

Fix Python UnicodeDecodeError with os.listdir

When you run os.listdir() on a directory containing files with non-ASCII names, you ...

How to Manually Activate a Python Virtual Environment

You've created a Python virtual environment but can't get it to activate. This guide walk...