Too many chefs...... had to clean up this topic a bit so Princess Jeanie wouldn't get too confused.
Jeanie.... Sol'* got you on the right track.....
Here'* a quick step-by-step of what I would suggest.....
-Boot the computer into "Safe Mode with Networking Support"
(do this by pressing F8 as soon as your computer powers on, and using the menu)
Run the scan on drive C:
(this is the same thing Sol sent you to, just an easier URL to remember)
-Once the scan is complete, delete any infected files, don't worry if it cleaned them or not. Just delete them.
-The goto http://www.lavasoftusa.com
Click on the download.com link and download Ad-Aware SE
-Install that, update it, and run it. When you run it, be sure to select "FULL System Scan" and not just "Smart Scan" which is default. You'll see the options when you goto run the scan.
-When that completes, highlight all the objects and delete them. Just use right click and "Select all" if the list isn't already all selected for you
-Next goto windowsupdate.com and make sure you are fully upto date.
Some people recommend SP2..... if you don't own a 'hardware' firewall, (EG a router) I'd probably suggest updating to SP2 (Service Pack 2). A hardware firewall is still your best option. Do not download any software firewalls, they might help against viruses, but they are pretty poor against hackers (which are rare), but worse they take up system resources and end up slowing your computer down a bit.
If you need anything else feel free to PM myself or Sol.... we seem to be on the same page.
Hope everything works out for you.