Chances are it is, By the sounds of you have been running the necessary tools Ad-aware, CWS and Spybot Have you run an online virus scan?
Give these a try
bitdefender
TrendMicro
If you could post a HijackThis log, That would be helpful, Some of these pest you have to manually remove.
By the way if you can't find anything on google about it, more than likely it needs to go,
But you should post a log