Right, I have Vista Home Premium installed on my pc. It is 32 bit. I am a little cofused though, so hopefully one of you experts will point me in the right direction. I know I have 32 bit but what are x64 and x86????? I have looked at my computer properties and my system is a 32 bit but what is the actual difference???What do I need to upgrade on my pc to be able to accept/run either x64 or x86???? Is it a big difference anyway????