Antivirus for Windows 7 Ultimate 64 bit?

I am building a new computer and will be loading 7 Ultimate 64 bit.. I just learned that Norton 360, which I have used for years...DOES NOT support Internet Explorer on 64 bit pc's....Can anyone recommend an Anti-Virus program for 64 bit..?
 
captaincranky, I have been using avast and am wondering if u are saying this is as good as my subscription is running out.
 
Nickc, What do you think of AVAST!....? and what ver are you using. I am considering the $49 Internet Security version.....How long have you been using it? Thanks.
 
I second the Microsoft Security Essentials suggestion. I am not aware of any tests showing how its detection compares with others, but there are probably some out there.
 
Thanks guys for the info.....VERY interesting and informing.. Appreciate the links. I don't mind paying, just want the best PROTECTION I can get... I have been down the road with viruses before...Don't want to go there again.....
 
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