Removing a name

When I open a certain program in my old computer it will state whom the program belongs to. I am selling this computer and the person buying it would like to have this program left on it. I have no idea where the disks are so I don’t want to delete it, but I don’t want my name on it either. I have tried to find it in the registry but haven’t been successful.

 

Hi there I dont know whether this site might help,its full of the sort of info you require,like you I would have tried the registry,hope it helps
http://www.computertim.com/howto/category.php?topic=windows

 

This link didn't help. Any more ideas?