Hello, and welcome to Geeks To Go,
I beleive admarketplace is an advertising feature...
Try the Malware removal forum. (Link in my signature)
"The adMarketplace patent-pending technology dynamically analyzes the publisher's Web page based on HTML and meta data, content and keywords. It then searches its network of advertisers within the particular keyword to determine the ad that best matches the page. A contextually relevant ad from the advertiser who bids the highest CPC is delivered to the publisher's site.
adMarketplace allows you to bid for the first opportunity to reach users when they are actively engaged in content relating to your products."