New
#1
ThreatFire
I've been using Threatfire in conjunction with Avast for quite a while. Seems to be a good combination. ThreatFire is behavior based where Avast is rules based. They team up well and I see no speed degradation, even on my old AMD Athlon 2000+ with 1 GB of memory.
Just got a new rig... Intel i7 920 with 6gb ram. Very fast but I was disappointed when I tried to install ThreatFire as it said it was only for 32 bit systems.
Now the good news. There is a 64 bit beta. Go to the Threatfire support forum and you'll find an entry entitled, "Threatfire doesn't support Vista 64bit?" The last page of the discussion gives a link to the beta software. I'd post it but I don't think I'm supposed to do that.
Its working very well on my W7 x64 in conjunction with Avast.