GLVK

Windows 7:
FJ82H-XT6CR-J8D7P-XQJJ2-GPDD4 (Ultimate)
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Windows 8:
FB4WR-32NVD-4RW79-XQFWH-CYQG3 (Core)
V7C3N-3W6CM-PDKR2-KW8DQ-RJMRD (Pro)
GNBB8-YVD74-QJHX6-27H4K-8QHDG (Pro With Media Center)
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Windows 8.1:
334NH-RXG76-64THK-C7CKG-D3VPT (Core) 
GCRJD-8NW9H-F2CDX-CCM8D-9D6T9 (Pro) 
GBFNG-2X3TC-8R27F-RMKYB-JK7QT (Pro With Media Center)
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Windows 10:
VK7JG-NPHTM-C97JM-9MPGT-3V66T (Pro)
YTMG3-N6DKC-DKB77-7M9GH-8HVX7 (Home)
YNMGQ-8RYV3-4PGQ3-C8XTP-7CFBY (Education)
DXG7C-N36C4-C4HTG-X4T3X-2YV77 (Pro for Workstations)