Adware:W32/Doubled.gen!C is a Generic Detection for variants from the Adware:W32/Popmenu family.
Popmenu variants are Browser Helper Objects (BHOs) that install a toolbar on the Internet Explorer (IE) web browser and display out of context advertisements unrelated to the user's search.
About Generic Detections
Unlike signature or single-file detections, a Generic Detection does not identify a unique or individual malicious program. Instead, a Generic Detection looks for broadly applicable code or behavior characteristics that indicate a file as potentially malicious, so that a single Generic Detection can efficiently identify dozens, or even hundreds of malware.
For more information about Generic Detections, please see Other:W32/Generic.