I downloaded Avast but i got the 32 bit version. I run on win 8.1 64bit. How do i get Avast 64 bit? I cant find any site that have it.
Avast 64bit dont exist … and you dont need it 
Asked and explained many many times if you search
You actually received a version that runs equally well on both 32 and 64 bit computer. 
avast! installer already contains 32bit and 64bit binaries. Installer detects what OS you afre using and installs the required files. In the end, it doesn’t really matter what you’re using, avast! will make a decision instead of you and install the correct files. And yes, avast! is 64bit. Otherwise it wouldn’t work on 64bit operating systems and it clearly is working on those. So yeah, it is 64bit.
No, avast is not 64 bit.
It works on a 64 bit system, but that doesn’t mean it is 64 bit.
Even really old applications I created and compiled in 386 are working on a 64 bit OS/system.
Would be really weird if they now suddenly where 64 bit.
Sorry to correct you Eddy. Here’s a screenshot of just some of the files for a 64 bit OS:
http://www.screencast-o-matic.com/screenshots/u/Lh/1436819543921-50847.png
Hm this question came up to me too today then i was looking for avast activity after machine as restarted. https://www.facebook.com/photo.php?fbid=1609451945994104&set=a.1387827344823233.1073741828.100007879421501&type=1&theater we can see avast runs 32bit avast antivirus but my machines is win 8.1 64bit. Is it normal? Avast is installed on 64bit folder.
The question has aalready been answeredan swered.
bob sorry but i didn’t find any right and good answer.
Essentially it is the same a RejZoR stated, avast also has 64bit binaries which will be installed when it detects a 64bit OS.
Whilst there are 32bit elements still present they can run on a 64bit OS. Just because you have a 64bit OS doesn’t mean you have to have programs that are exclusively 64bit.