The minimum specifications stated by Microsoft according to the Wikipedia page: If you have a 32 bit OS then 1 GHz processor, 1 GB RAM and 16 GB Hard Drive Space. While if you are having a 64 bit OS, then 1 GHz Processor, 2 GB RAM and 20 GB of Hard Drive Space. The only requirement difference among 32 bit and 64 bit is a 1 GB extra RAM and 4 GB extra space of hard drive required. interactive intelligence