Question: what is the difference between windows vista 32 bit and 64 bit?
Answer: The main difference between 32-bit and 64-bit operating systems is the way that they manage memory. For example, Windows XP 32-bit is limited to a total of 4 GB maximum of system memory to be allocated by the kernel and applications (this is why systems with 4 GB of RAM do not show the total system memory in Windows.