Horizon Xbox Modder giving me unwanted third party ads I am unable to remove?

[Sylvannas]

The other day (I think it was Monday) I installed Horizon. During the installation process it asked me if I wanted their promotional toolbars, ads, etc, I declined all of them. I then decided I didn't want to use it anymore as it didn't function properly so I uninstalled it and cleared my recycling bin. Now it appears I am being lumbered with third party pop ups and ads on Google Chrome, Youtube, Facebook, you name it. I've tried blocking them from the url bar in Chrome, AdBlock, Norton, System Restores, but they won't seem to go away and it's really frustrating how every time I click a various pop up will appear and will invade my Google homepage and Youtube. Any ideas how to rid of them for good, or at least make it able to permanently block them?
Thanks.