Is the software legal? If not that might be your problem. Also, how is it being installed: via CD or download? If it's by CD, check the CD and see if it's in good condition. If it is, you might want to buy a new CD. If not, buy a new CD, or copy it to another CD. If it's via download, the program is probably corrupt. Try downloading it from another source.
EDIT: Oh, a Windows problem. There's not much you can do, I'm afraid. The only thing you can do is play the $54 and get it fixed.