Run these programs in this order:
Rkill
Malwarebytes
Super Anti Spyware
Hitman
AdwCleaner
Combofix
Hijackthis
Then go into your web browser and remove any add-ons or extensions that may have been installed
Go through your installed programs list and remove any other programs that ended up getting recently installed around the time this issue started to occur
Then scan with a legit antivirus program
--Computer Technician who fixes this stuff every day