Windows Defender will not be updated

I am experiencing strange shift of internet and I think it's because Windows Defender won't be able to update. I am running Vista x 64 final. I recently started to receive a new error every time I start my computer, something to the effect of Windows Defender service is unable to start. If I try to start it manually, I got the error: 0 x 80070003: the system cannot find the path specified.

Normally I wouldn't complain about windows Defender does not because I have my own solutions, but I believe that it is still problematic within my system. Every half hour or so, my firewall warns me to say that something in a temporary folder called mpistub.exe or something is trying to access the internet. I found this exe is a windows update, so I allow it through. Now, I believe that because the service cannot start, the update is impossible to apply and continues to go to the internet to try to get a shift to internet update, causing news for my pc everything.

Someone knows something like that? I would like to reinstall windows Defender so that it can update itself and let my only internet. And I don't mean simply turning on or off; I can't do this if the service does not start. Oh and I tried to restore to an earlier date, it is not far enough.

Hi GooMoo,

Try the steps of troubleshooting provided by Ajay, in thisthread.

Dena
Microsoft Answers Support Engineer
Visit our Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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