My computer wallpaper changed to ads...?

I was just on my computer, and I noticed that m wallpaper had changed to a vey wierd backgrund. It has ads, like on a website, and they are links. I don't clickhe, but they say thing lke "Will you live to be 80-Click to find out", "Why are you so tired", "How to know you are having a bad day, and at the bottom is says things like "Love letter", and "Fun to be with". Also, there are banners for Netflix and Wachovia at the tp and side. Please, if you know what this is, please tell , and if you how to fix it th would be great too!