Not to sound redundant because The Phlebob wrote something similar; You could try the following.
To Remove it, follow these directions. (For everyone who likes to post a long list of sites, take a note- 1)These are real, working directions. 2) I wrote them, and use them in person. 3) I wrote, produced, and maintain one of the stinger tools which removes both adware/spyware and viruses.)
(1) Turn off System Restore (This prevents viruses that store themselves in archived restore paths from replicating) Do this by 'Right Clicking on My Computer'->'Click Properties'->'System Restore Tab'->'check the box'
(2) Run an Antivirus and A spyware/Adware remover. If you don't have one, you can download a free one from the list below.
(3) If these don't work, or there are files that cannot be removed, then Try one of the Virus/Trojan Stingers below
(4) If you still have a problem, Run Hijack this! from TrendMicro (http://www.trendsecure.com/portal/en-US/threat_analytics/hijackthis.php)
and 'Do a system scan and save a log file', then email the log file to the.bearded.amish@gmail.com and I can further advise you as well as update Joint Effort 3 to remove your infection.
(5) Make sure you turn System Restore Back on when your problem is resolved.
Virus/Trojan Stingers:
------------------------
~TrendMicro CWShredder
http://us.trendmicro.com/us/products/personal/CWShredder/index.html
~Atribune's Vundo Fix
http://www.atribune.org/content/view/24/2/
~S!Ri's SmitFraud Remover
http://siri.geekstogo.com/SmitfraudFix.php
~** The Amish's Joint Effort 3
http://prod.campuscruiser.com/cruiser/widener/ejwyrwas/index.html
Free Antiviruses:
-------------------
~AVG
http://free.grisoft.com/
~Avast
http://www.avast.com/
~TrendMicro HouseCall
http://housecall.trendmicro.com/
~Panda Active Scan
http://www.pandasecurity.com/homeusers/solutions/activescan/
~McAfee Free Scan
http://us.mcafee.com/root/catalog.asp?catid=free
Free Antispyware:
-------------------
~Spyware Blaster
http://www.javacoolsoftware.com/spywareblaster.html
~Spybot Search and Destroy
http://www.safer-networking.org/en/index.html
~Lavasoft's Adaware
http://www.lavasoftusa.org/products/ad_aware_free.php?PHPSESSID=0d220f30be752835af83c12db511586b