Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused in Proxy Pass

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix Windows 11 Update Stuck at 0% with Service Not Running
You click Check for updates, see 0% for ages, and maybe an error like 'Windows Update service...

Fix Windows Explorer Restarting After Crash
If Windows Explorer (explorer.exe) crashes and then keeps restarting, you may see the desktop fla...

Fix 'pip externally managed environment' Permission Denied Error
If you see error: externally-managed-environment when trying to install a Python pac...

Fix Windows 11 Blue Screen After Update Using Compatibility Mode
You installed a Windows 11 update, rebooted, and hit a blue screen. This often happens when a dri...

Git index.lock File Exists: Quick Fix Checklist
You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused in Proxy Pass

Fix Windows 11 Update Stuck at 0% with Service Not Running

Fix Windows Explorer Restarting After Crash

Fix 'pip externally managed environment' Permission Denied Error

Fix Windows 11 Blue Screen After Update Using Compatibility Mode

Git index.lock File Exists: Quick Fix Checklist

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