A licence key is the 4POS voucher number. This voucher number cannot be used on more that 1 pc or business.
The voucher number is verified using the computer hard drive & if different than what was registered, it constitutes a "move" to a new hard drive.
Furthermore, we limit the moves to 10 as if a user tries to use the same licence on 2 different pc's, the number of moves will run up to 10 within a few days & the customer will have to purchase a new licence.
This practice is standard for many software companies to discourage piracy.