Possible Duplicate:
How can I determine the installed edition of Windows XP if the OS does not boot up?
Without being able to boot the OS that is.
I was wondering about this for awhile - I get quite a few PC's delivered to me which don't boot and mostly people can tell me what they have but every once in a while they just don't know. Of course customers never keep their CD's where they can find them...
So How do I figure out if they have Home or Professional?