Hi So when the windows 7 beat was launched, i ended up choosing to download the 32-bit version as I knew it would run, and I wasn't sure if I was compatible or not. 1. I have a 20" iMac 2.4GHz 2GB RAM etc. Is my computer capable of running 64-bit? 2. Whats the difference between 32-bit and 64-bit? Is 64-bit faster? Any help much appreciated, thanks.