OT WIN NT 5.1

Sorry for being OT but I have a question I don't know where esle to ask. I have a website site it is kinda lame http://datingblues.vze.com/ but 80% of the hits I get are from people using Win NT 5.1 the rest are from people using other versions of Win NT and I know this is server OS so I am wondering if it is really the people who are hitting my site or is it their ISP that I am getting these responses from

There are three kinds of people in this world those who can count and those who can't