So I just bought this laptop and it has an AMD Turion TL-64 X2 2.2Ghz 64-Bit processor in it. But, the Windows Vista version that came with the laptop is 32-bit. Shouldn't the OS be 64 bit???
both AMD and Intel's mainstream processors operate in 32 and 64 bit modes so it's not particularly important whether you use a 32 or 64 bit operating system unless you have other requirements (like b1gapl alluded to). of course if you have a true 64 bit only processor like the Itanium then you need a 64 bit OS.