Checklists for software errors, setup, and tool workflows.

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Fix Windows Security Service Disabled by Group Policy

If you see "Windows Security service is disabled by group policy" or find that Windows Security i...

Enable Windows Defender After Group Policy Disabled It

If Windows Defender is disabled and you suspect a Group Policy setting is the cause, you may see ...

Fix 'Run Command Prompt as Administrator' Permission Denied Errors

You right-click Command Prompt, select 'Run as administrator', and get an 'Access denied' or 'Per...

Fix Windows Activation Error After Hardware Change

If you've recently replaced your motherboard, CPU, or other major hardware, you may see a Windows...

Fix 'PowerShell Not Recognized as Internal or External Command'

If you see the error 'powershell' is not recognized as an internal or external command

Windows Security App Not Opening After Update: Fixes
After a Windows update, the Security app may refuse to open—clicking the icon does nothing, or it...