Checklists for software errors, setup, and tool workflows.

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Fix Windows Defender Real-Time Protection Authentication Failed

When you try to turn on Windows Defender real-time protection, you might see an error saying some...

Fix 'Command Prompt Run as Administrator Permission Denied'

You try to run Command Prompt as administrator, but you get a 'permission denied' or 'access deni...

How to Fix Outlook 404 Not Found Error

When you see a 404 Not Found error in Outlook, it usually means the program can't locate a resour...

Fix Windows Terminal 502 Bad Gateway on Azure Connection

You're working in Windows Terminal, and when you try to connect to an Azure resource—like a VM, w...

Fix Robocopy Error 5: Access Denied in Backup Command

When you run a Robocopy backup command and see ERROR 5 (0x00000005) Access Denied

How to Enable Windows Defender After It Failed to Start
If Windows Defender won't start, you may see an error like "This app has been turned off" or "Win...