Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Checklist to Diagnose Chrome Profile High CPU Usage

If Chrome is using 90%–100% of your CPU even with just a few tabs open, the problem is often the ...

Windows Defender Real-Time Protection Off but Still Scanning: Fix

You turn off real-time protection in Windows Defender, but scans still run. This can be confusing...

Fix Chrome Profile Cannot Connect to Proxy Server

When you open Chrome and see 'cannot connect to the proxy server', it usually means your browser'...

Jupyter Kernel Dead: Common Causes and Fixes

You're working in a Jupyter notebook, and suddenly the kernel dies. The notebook becomes unrespon...

Fix 'ffmpeg command not found' in PHP exec()

When you call exec('ffmpeg ...') in PHP and get ffmpeg command not found

Fix Windows Defender Firewall Blocking Internet Connection
If your internet stops working after a Windows update or firewall configuration change, Windows D...