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

How to Use Chrome's Built-in Memory Cleanup Tool

If Chrome is eating up your system memory and slowing everything down, you don't need third-p...

Fixing Nginx Upstream Connection Refused on Port 443

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

How to Fix Nginx 502 Bad Gateway in Docker Compose

If you're running an application with Docker Compose and Nginx as a reverse proxy, a 502 Bad ...

How to Fix Cloudflare 522 Error (Firewall Blocking)

If you see a Cloudflare 522 error, the connection between Cloudflare and your origin server timed...

Fix Windows Defender Real-Time Protection Not Turning On After Update

After a Windows Update, you might find that Windows Defender's real-time protection is stuck ...

Fix Nginx Permission Denied for Static Files

Common Causes

When Nginx returns a 403 Forbidden or 'permission denied' error for...