Hi, I recently got a tc4400 from ebay. got it for 130$ and I think it was a greet deal to take notes in class (tons of math chesses make it almost impossible to type the notes). Anyway, it come with winxp and I installed win 7. I used x86 but after I was done l started wondered if should have installed 64-bit. So my question is which version are you guys using? Should I install the 64-bit version instead? Which one is better on the battery?