Ok, finally got my login to generate my license and before I do.. which is better?  On a movable USB or on my hard drive?  It sounds like the license won't work for me on a USB drive if it's specific to operating system as I have windows 7 on my laptop and XP on my desktop.  Since it looks like I'll have to only use the program on my laptop is it best to put the license on my hard drive?

...... Kendra