Windows Defender

Jess31
Jess31 used Ask the Experts™
on
I'm on Windows 8.1.
In Control Panel, System and Security, Action Acenter it shows my Windows Defender is off for Spyware and unwanted software protection as well as for Virus Protection. How do I turn them back on?
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Commented:
Enable the services first in Start > Run > services.msc (enter), There should be 2 lines (browse to the W, 2 lines with Windows Defender in the name) set on Manual. Set it back to automatic.
Please note, you now might have conflicting software, as Windows Defender was usually shutdown because of another antivirus. If you enable it like this, it probably means you have TWO antivirus solutions on your computer (both scanning the same thing, resulting in conflicts and system slowdown).

Author

Commented:
I followed your intructions. But when I try to turn it on (I don't have an option to set to auto) I get a message "Windows could not start the Windows Defender Service service on local computer"  Error 577 and some msg saying it can't verify the digital signature....

Commented:
Are you sure all third party antivirus programs on your computer have been properly uninstalled? (Preferably the correct way, through uninstall icon or through Programs and Features > Uninstall)
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Author

Commented:
If fact I had malwarebytes still installed. So I uninstalled it. Now I tried your instructions again but I get some result. This is when I try to Start the service. As for setting to auto I don't find such an option.
Senior Software Engineer (Avast)
Commented:
>> How do I turn them back on?
I think the better question is why would you want to? Given that Microsoft Security Essentials (the bigger brother to Defender) recently only scored a detection rate of 57% in one of the reputable anti-virus tests I'd leave it off and, instead, go download yourself something like Avast, instead.

Author

Commented:
Well in the past I have Avas and other free ones and they were ok, but they were resource hogs. So I went with MS and didn't really find them all that different. None of them were particularly good in picking up what they consider Malware as oppose to Viruses, and all seemed to keep me virus free.
Where do you get this score from? And what did Avast score?

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