Windows 7 Enterprise\Windows 7 Professional C4M2X-2WY3Q-PG2MW-M68RH-BWQJ3 

Windows 8 Enterprise\Windows 8 Pro 4NJCB-R3DDC-M67QF-D238P-J4YQP 

Windows 8.1 Enterprise\Windows 8.1 Pro F2N2Q-2TPR9-FFXHF-R7J7F-FCYDQ