I had that a while ago.. It's you're computer. That you've won an Ipad things comes with a download of something. (Not TPT)
pop up ads in Powder Toy? I have the solution, for a measly 10,000 dollars, i will turn on your ad block services.
Im sorry but if i start having this issue im turning on my ad-block... I have it off for this site because i support powder toy.. But really if i started getting ads like that i would lose my sanity if i didnt do something...
AND also..... It may be malware too.. Ive been on other sites before where the WebGod of the site disabled adbots from doing that stuff.. But people still had it happening and He/She said "You have Malware then... I have those types of ads disabled." And what not...