I want to install windows 7 RC1 on my 2 laptops. One has vista business 32 bit and is a slower netbook type laptop 1.6 atom z530, 1gb ram, 120gb hard drive and the other laptop is a desktop replacement powerhouse 2.8 ghz, 4gb ram, and has 64 bit vista home premium. I downloaded both the 32 and 64 bit windows 7 RC1 and have serial keys for both. which should I install on which..and does it matter if i just install 64 bit on both or what... is 64 bit better and will it run smoother etc... thanks for the help