Ok, I know there have been some threads about this topic a while ago and I was reading the stickies about the 32 vs 64 bit but I've seen many people here on the forums with 4 GB and I assume you all have a 64 bit OS I'm about to buy Vista Home premium 64 bit but I would like to know if all my applications and devices will work without mayor hassle. What about gaming? did any one found a game (specially old ones) that won't work under 64 bit, do you have a link or a list for the applications (most common ones) that might not work with 64 bit? What about antivirus? I have kaspersky 2009, what about programs like Nero 8, Encarta 2008, clone DVD, photosuite, well I don't know I jsut list a few programs that I use the most and have the concern of not working under 64 bit. Thanks in advance for the input.