Hi. I'm trying to install NXT2 on a windows 7 64 bit pc. I get the message: "Setup has detected products currently on your system that should be uninstalled prior to continuing with the installation. -- If you choose to continue the installation, these products will be uninstalled first. Do you want to continue the installation?" The "products" are not identified. I certainly don't want to uninstall software that I use. Help! Thanks.