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

Docker Container Restarting Due to Health Check: Causes and Fixes

Fix Jupyter Notebook Token Expired or Invalid Error

When you try to open Jupyter Notebook and see “token expired” or “invalid token,” it usually mean...

How to Install Windows Security on Ubuntu (via Virtual Machine or Wine)

If you're looking to run Windows Security (Microsoft Defender) on Ubuntu, you've hit a fundamenta...

Fix Windows Activation Error 0x80070005 504

You try to activate Windows and see error code 0x80070005 with a trailing 504. This usually means...

Fix 'Windows Defender Firewall Has Blocked' Error

You see a notification that Windows Defender Firewall has blocked an app or feature. This usually...

Fix Windows Update Service Stuck on Starting

You open Services.msc, see the Windows Update service status as 'Starting', and it never changes....