My wife recently acquired a Toshiba laptop from a friend. It has 32bit version of Windows 7 Ultimate loaded on it. When I looked up the processor on it, I found it had a AMD Sempron SI-42. The Sempron was a 64 bit processor, but just single core. Does this mean that I could load the 64 bit version of Windows 7 on it and be good?? Or do I need to stick with the 32 bit Windows 7??