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Free Antivirus solutions for Windows

I am looking for a free native 64 Bit Anti virus package. I know lots / nearly all packages will run in 32bit emulated mode, but I can't seem to find a truly native 64 bit package, that's free. Anyone?

  • 1
    For Windows 7, presumably? – Jonik Sep 4 '09 at 20:55
  • @Jonik: Presumably. All of JL's other questions seem to be about Windows / Windows 7. – Chris W. Rea Sep 4 '09 at 21:00
  • This is actually a duplicate since all the Windows AV programs listed on the mentioned question run both 32Bit and 64Bit. However I am allowing it as it is a valid question. – BinaryMisfit Sep 5 '09 at 7:27

Microsoft Security Essentials

Link is to Softpedia. It's in beta right now but I've been using it for about a month and so far it works great. It has a 64bit version.

  • Would you trust it enough to do away with your traditional AV product? Not really sure if I'm ready to trust MS with an AV product, but I could be wrong? – JL. Sep 5 '09 at 13:02
  • I already did. I used Kaspersky AV before. I don't think Microsoft is very new in the AV "game". Their paid OneCare app was pretty decent from the tests I read. It seems like they improved on that and got to a very nice product. You really should try it. – miloshadzic Sep 5 '09 at 15:47
  • I have marked this answer as accepted, because out of all the answers, its the only fully fledged 64bit solution. – JL. Sep 5 '09 at 18:32
  • And yeah - I've downloaded it, and it seems a very well polished solution. I'll be reading more reviews about it, but from what I've read so far it's a competitive AV solution. – JL. Sep 5 '09 at 18:43

I've always used AVAST and never had any problems. The link provides you information on a 64BIT AVAST.


A good site for x64 software is http://www.start64.com.

you'll certainly find some trailware in the security page: http://www.start64.com/index.php?option=com_content&task=blogcategory&id=53&Itemid=117

They don't list any known free anti virus scanner as 64bit native.

  • Thanks Davy , yes unfortunately they don't but lots of other cool stuff there... – JL. Sep 4 '09 at 20:55

AVG Free Antivirus.

Here's a snapshot in Process Explorer. While some of its processes are 32-bit, the important one -- avgrsa.exe, which is the resident shield that scans accessed files -- is a native 64-bit process. The proof's here:

AVG processes

Anyway, I wouldn't get too hung up on everything you run being 64-bit. It's often not necessary, and the performance difference is negligible for most applications.

(By the way, I own a registered version of AVG and I also didn't include all of the options during install, so what you see may not reflect exactly what you'd see in the process list for the free version of AVG.)

  • 1
    the reason you'd want a 64bit virus scanner is that else the activities of your 64bit process (such as explorer) would not be scanned... – Davy Landman Sep 4 '09 at 21:08
  • Good point and well-said - I should have elaborated when I said "the important one" above :-) – Chris W. Rea Sep 5 '09 at 2:02

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