Checklists for software errors, setup, and tool workflows.

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Stop Command Prompt High CPU Usage When Idle

You open Task Manager and see Command Prompt (cmd.exe) using 20-40% CPU, even though no windows a...

Windows Activation Error 0xc004c003: Step-by-Step Fix

You see error 0xc004c003 when trying to activate Windows. It usually means the product key is val...

How to Clear Windows Security Threat History That Won't Delete

You've resolved a virus or malware issue, but the threat history in Windows Security still shows ...

How to Check PHP Memory Limit for Composer

If Composer fails with an error like Allowed memory size of X bytes exhausted, your ...

Fix 'No matching distribution found' Error in pip

When you run pip install somepackage and get ERROR: Could not find a version t...

Jupyter Kernel Not Starting Python Environment: Fixes
You launch a Jupyter notebook, select your Python environment kernel, and the notebook stays stuc...