How do I Manually start Windows defender in Vista?


Windows defender has stopped and can’t start up again, how can I start it manually?


[Moved from Windows]


Hi Astrid67,

Thank you for using Microsoft Vista Answers Forums.



Go to Start, Control Panel, Administrative Tools,  Services. Locate Windows Defender.

 Right click and select Properties and ensure that the Start-Up Type is Automatic.

Once changed, click on Apply and OK.

Exit and Restart your computer. Check back taking the same route to confirm Windows Defender has started.

If the above steps does not fix your issue, you can download and reinstall Windows Defender via this link

Please reply and let us know if your issue is resolved or if you need further assistance.

David O
Microsoft Answers Support Engineer
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David O

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Question Info

Last updated May 17, 2020 Views 38,732 Applies to: