Checklists for software errors, setup, and tool workflows.

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Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Windows Security App Not Working After Update: Fixes

After a Windows update, the Windows Security app may fail to open, show a blank window, or displa...

Fix Windows Defender Real-Time Protection Permission Denied

When you try to turn on or off Windows Defender real-time protection, you might see a "Permis...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

When Git reports SSL certificate problem: unable to get local issuer certificate, it...

Fix Node.js Heap Out of Memory When Loading Modules

If you see FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaS...

How to Show Hidden Icons on Taskbar in Windows 10
You may notice that some app icons in the system tray (notification area) are hidden behind an up...