Thanks, so much! I did as you recommended and plug both the old Logitech mouse and keyboard in after I had shut down the computer and they are working just fine, with the exception that when I went into the Control Panel to program the mouse wheel to DELETE, the choice to do that wasn't there. Oh, well, I guess we can't have everything. If anyone knows of a mouse that will work with Windows 7 Pro, 64 bit, that the wheel can be programed to DELETE, I would appreciate a heads-up. Thanks, again.