Looks like a virus problem to me. Install Norton antivirus & get the latest updates and do a full System scan
Just see if Norton is able to find the virus & fix the problem. Also use good anti-spyware software like
SpySweeper & do a full scan. If nothing helps & the problem remains. I'm sorry , you have to delete the
partitions or first try formating the partition where you installed Windows & install Windows again.
See if it works.