Checklists for software errors, setup, and tool workflows.

Fix Chrome Profile Permission Denied After Update

After a Chrome update, you might see a "permission denied" error when trying to access your profi...

Jupyter Kernel Connection Error: Causes and Fixes

You start a Jupyter notebook, try to run a cell, and see a message like "Kernel error" or "Connec...

How to Fix Windows Security Not Working

Windows Security (formerly Windows Defender) may fail to open, show a blank page, or refuse to up...

Fix Chrome 504 Gateway Timeout After Update

After a recent Chrome update, you may see a 504 Gateway Timeout error when tryin...

Fix Docker Build Error: 'failed to solve: manifest not found'

You run docker build and get an error like:

failed to solve: error fetching ...

Fix Windows Security Stuck on Loading After Update

After a Windows Update, you might open Windows Security and see a spinning circle or a blank page...