Hi
Clear all your cookies and cache.
Download Malwarebytes Anti-Malware Free here
http://www.malwarebytes.org/downloads/
Rename the file you download called mbam-setup.exe to mb.exe Install it and update the programs data base, then run it.
It is a very good little program. It should find the offending program and delete it. After a reboot delete all your restore points and set new ones.