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

Certbot Nginx Plugin Install Failures: Common Fixes

When you run certbot --nginx and get an error like "The nginx plugin is not working"...

Command Prompt Setup Guide for Beginners

What is Command Prompt?

Command Prompt is a text-based interface in Windows that lets you...

Fix Windows Defender Error 502 Bad Gateway

You open Windows Security and see 'Error 502 – Bad Gateway.' This usually means Windows Defender ...

Fix PowerShell DNS Query Permission Denied Errors

When running DNS queries in PowerShell, you might see a 'permission denied' error. This typically...

How to Set Up OneDrive Selective Sync on Mac

If you're using OneDrive on a Mac with limited storage, selective sync lets you pick which folder...

Fix Microsoft Store 504 Error After Windows Update

After a Windows update, you might see a 504 error when opening Microsoft Store. This usually mean...