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

SSH Permission Denied (Publickey) on EC2: Setup Fixes

If you're seeing "Permission denied (publickey)" when trying to SSH into an AWS EC2 instance, the...

How to Unlock an SQLite Database from the Command Line

If you see an error like database is locked when trying to access an SQLite database...

Fix 'Windows Defender Not Recognized' Error in Command Prompt

Windows Defender 404 Not Found Registry Fix

You open Windows Security and see a blank page or a '404 Not Found' error. This often happens aft...

Fix Windows Security Access Denied When Opening Settings

You click Windows Security in the Start menu or try to open Virus & threat protection, and instea...

How to Activate a Virtual Environment in a Python Script

You might need to run a Python script that depends on packages installed in a virtual environment...