I am trying to determine if I have 32 bit or 64 bit
Windows XP. How do I determine which I have?
If you have XP Home edition then you definitely have 32-bit, as it's only
available as 32-bit.
If you have XP Professional edition, then if you need to ask the question,
you've got 32-bit. The reason for this is that the 64-bit version will only
run on a very limitied set of high-end, very expensive processors. Any
standard Pentium, Athlon etc. is 32-bit.