Checklists for software errors, setup, and tool workflows.

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Fix Windows Activation Port Error 0x80072efd

If you see error 0x80072efd when trying to activate Windows, the message often says something lik...

Windows Security Antivirus Not Detecting Threats: How to Fix

If you suspect Windows Security (formerly Windows Defender) is not detecting threats, you might s...

How to Fix Jupyter Notebook Token Authentication Error

When you start Jupyter Notebook, you might see a prompt asking for a token or password, or the br...

Fix Microsoft Teams Token Expired by Clearing Cache

If you see a 'token expired' or 'sign-in error' message in Microsoft Teams, it often means the st...

Fixing 'docker daemon not running' Error: Connection Refused

You run a Docker command and get: Cannot connect to the Docker daemon at unix:///var/run/do...

Fix Windows Security Certificate Error in Outlook 365
You open Outlook 365 and see a security certificate warning: "There is a problem with the proxy s...