I'm completely stumped. In the last couple days I've been noticing pop up ads, and also legitimate website ads being replaced. They all seem to come from the Zedo Network. I have run multiple virus scans on my computer/Cleaned browser cache. I'm a pretty experienced computer user, and have no problem finding and removing any virus I've encountered on friends computers.
I recently switched to a new internet provider and have both internet connections for another week. All of the computers in my household are still on the old connection. When I visited the same websites on one of them, everything was fine. I then switched it over to the new connection, and it started having ads replaced too. Either it seems that my PC has something incredibly nasty that was able to infect the other computer over the network, or that the new ISP is injecting ad code.
I would appreciate help diagnosing the problem, and narrowing down if it is something like the ISP injecting it. I hope I'm just tired and overlooking something simple.