Checklists for software errors, setup, and tool workflows.

How to Fix Windows Security Proxy Error 0x80072efd

You see error 0x80072efd when Windows Security tries to check for updates or run a scan. It usual...

Fix Remote Desktop Not Connecting Over VPN

When you're remote and your VPN connects but Remote Desktop (RDP) won't, the problem is usually i...

Fix High CPU Usage by Antivirus Scanning PowerShell

If you notice that PowerShell (powershell.exe or pwsh.exe) is using high CPU, and you have an ant...

Fix CMD Service Unavailable Due to Group Policy

Situation

You open Command Prompt and see an error like "Command Prompt has been disabled...

Jupyter Kernel Not Starting: Quick Fixes

You open a notebook, try to run a cell, and the kernel dies or never connects. This is a common J...

Fix Windows Security Cache Full Error: Clear & Reset Steps

If you see a message that the Windows Security cache is full, it usually means the antivirus or s...