This is adaware or PUP program and it can easely remove with "AdwCleaner" ( http://www.bleepingcomputer.com/download/adwcleaner/ ).
You should also clean browser cache,history,cookies etc.and protect youre browser with BitDefender-Traffic Light and AdGuard extensions.
Also check you startup programs with a CCleaner and uncheck unwanted ones.
You may also scan and remove garbage on you PC with CCleaner, just uncheck "monitoring" features from it in options, you don't need that.
Clean your PC with herdProtect and Malwarebites-Antimalware to eliminate other dangerous and unwanted stuff!
Good Luck ;)