I suspect that spybot will solve your problems, and as long as your grandkids are using the computer occasionally, i would use it regularly. First time I ran it it killed a host of things Ad-Aware had missed. To be sure, after you have used it, a standard suggestion on this board is to go to
http://www.spywareinfo.com/downloads.php#startup , and download 'Startuplist'.
Unzip, doubleclick it, and it will generate a text file that will list all running processes, all applications that are loaded automatically when you start Windows, and more.
Go to Edit > select all, copy it and post the contents here.
Then someone more knowlegable than I can check if everything has been cleaned.
Good luck.
