computer won't let me log on at all!!!!

Hi
I ran Adware on my computer as it was running slow. The scan found 110 critical things which I removed. I then turned the machine off. Now when I start the computer it won't let me log in at all. It show the user profiles and when you click on one it says saving your settings and shuts down. I've tried tonnes of times to get it going but getting nowhere. Anyone any ideas on how to resolve this.........my dissertations on the computer. is it blaster worm??