Unwanted "ads by selectionlinks" on my computer?

[Jordan]

On Facebook and Youtube there are these extremely annoying ads that have just recently started showing up, at the bottom of the ads they say :"Ads by SelectionLinks." I'm pretty sure it's something on my computer, I actually removed something called selectionlinks from my programs, but it didn't make a difference. I've noticed that the ads show up when I pull one of the two websites up on firefox or chrome, but not internet explorer, that's what tells me it's my computer, and also the fact that I haven't seen any complaint about any huge new ads one facebook or youtube anywhere. I'm running windows 7, please help me get rid of them.