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There is built-in AV software in Windows 8, will it will turn itself off when I install antivirus from another vendor?

Should I install another AV, or will default one suffice?

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closed as not constructive by soandos, Xavierjazz, Journeyman Geek, Karan, Diogo Oct 30 '12 at 0:06

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I'm not sure if this is a subjective enough question. – Caleb Jares Oct 29 '12 at 20:55
up vote 5 down vote accepted

Default one will suffice for many people, but if you so desire, Windows Defender will step aside if you install a new AV solution.

CAVEAT Action Center has to recognize that it is installed, otherwise you will have to disable the Defender service manually.

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Well in my opinion 2 would be nice. But there is always the chance that some AVs will conflict with each other. I remember McAfee doing the same for me.

So yes another one should do but just 2 or else it would consume a lot of your resources.

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I would suggest against 2. One should be enough. :) – Bryant Oct 29 '12 at 20:55
But you have a greater chance of defending yourself against viruses in case one doesn't catch it if since it isn't in their virus definition database. – Matthew Wong Oct 29 '12 at 20:59
+1. For the casual user, one is probably enough. But two provides better protection. Besides everything ultimately boils down to how much your computer interacts with the outside world (Internet, pendrive, etc). If not at all, antivirus is not necessary at all. If average, Windows Defender should be enough. – Rakib Ansary Oct 29 '12 at 21:00
I think most antivirus programs work the same way. If it gets by one, it will most likely get by both. You're just wasting your time and resources with two. (note: this is just my opinion and suggestion). :) – Bryant Oct 29 '12 at 21:00
Having two anti-virus security software suites installed at the same time is bad idea. It can cause your system to crash. Having 2 WILL NOT increase the chances of you detecting something. – Ramhound Oct 29 '12 at 21:17

The default antivirus should be enough. I used Microsoft's Security Essentials in Windows 7 and it worked great. If you have a specific need for another program that should work as well.

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As others have suggested installing a second anti-virus, let me say NO!

That will just introduce conflicts and false positives and prevent either from being fully functional.

The default Windows 8 anti-virus is Windows Defender, which evolved from Microsoft Security Essentials which has been my choice for years now. It has been comparable to Norton and McAfee in terms of protection, if not better. Personally I like it more because its just seamless, and it doesn't slow down my system the way Norton always did.

So you shouldn't need anything else.

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What conflicts? See Jared's answer. – Karan Oct 29 '12 at 23:33
I wasn't aware that Windows Defender will do this, but as a general rule other anti-virus software will not. – corwin01 Oct 29 '12 at 23:46
"as a general rule other anti-virus software will not" - True, this holds true only for Defender. Also, you might want to edit your answer slightly to replace MSE with Defender (although the latter includes many features from the former, it is not officially MSE any longer). – Karan Oct 29 '12 at 23:48
Ah, I thought it still still officially MSSE, just integrated. I shall correct it. – corwin01 Oct 29 '12 at 23:57

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