win7 itself has about 60-70 itself if i remember right
dont worry about it.
ive got 105 but ive got a load for examlple. processes for mouse,3 for keyboard,printer,different software
and many other things
you should be looking at the memory each one takes instead thats where the problem's lie
most viruses will take quite a bit up as well as programs that are/will slow your pc down