Run Malwarebytes quick scan… make sure evrything detected is marked for removal…
You can download it from here http://forum.avast.com/index.php?topic=53253.0

Run AdwCleaner and click clean … http://www.bleepingcomputer.com/download/adwcleaner/

Attach logs here

Did that help?
If not see the first link i gave you, scroll down to OTL … follow instructions and attach logs, then a malware expert will help you when online