I currently run Vista Ultimate and have had very few problems. I am going to upgrade to Win 7 in the comming months, I have read that the Full Ver of 7 comes with both 32-bit and 64-bit OS's. The question I have is does the OEM version only come with the 32 or 64-bit version? I dont really need the 32-bit as I'm going to the 64-bit version, and I could care less about MS support, I havent had to use it in 13yrs.