Checklists for software errors, setup, and tool workflows.

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Fix Windows Defender Antivirus Permission Denied Error

You try to start Windows Defender Antivirus and get a “permission denied” error. This typically h...

How to Fix Windows Defender Not Starting Automatically

If Windows Defender (Microsoft Defender Antivirus) isn't starting automatically when you boot you...

How to Fix Windows Defender Version Mismatch on Windows 10

You might see an error saying Windows Defender has a version mismatch, or the app won't open beca...

Fix Windows Store Stuck on 'Installing Update'

You open the Microsoft Store and see the banner: "Installing update…" but nothing happens for min...

How to Fix Git Non-Fast-Forward Push Errors

When you run git push and see an error like ! [rejected] main -> main (non-fas...

Windows Defender Authentication Failed: Step-by-Step Checklist
You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...