Possibly a virus infection that has modified the 'exe' run parameters.
If you can clean the system first it may be possible to repair afterwards.
Try burning and booting from a rescue disk such as this:
http://support.kaspersky.com/faq/?qid=208282173
That will scan the system and clean any virus traces that it finds. After that it should be possible to do repair work on the system.
Let us know how you get on.