OEM EDITIONS ARE BOUND TO YOUR MOTHERBOARD (PC). IN CASE OF MOTHERBOARD REPLACEMENT, YOU CAN CALL MICROSOFT SUPPORT TO HAVE YOUR OEM KEY TRANSFERED TO YOUR NEW MOTHERBOARD (PC).
Permanent,Authorized,Global Key, For 1 PC； Support Both 32 Bits And 64 Bits； Windows 8.1 is different from Windows 8. Please install correct version of system and activate it with the key.
 

OEM EDITIONS ARE BOUND TO YOUR MOTHERBOARD (PC). IN CASE OF MOTHERBOARD REPLACEMENT, YOU CAN CALL MICROSOFT SUPPORT TO HAVE YOUR OEM KEY TRANSFERED TO YOUR NEW MOTHERBOARD (PC).
Permanent,Authorized,Global Key, For 1 PC； Support Both 32 Bits And 64 Bits； Windows 8.1 is different from Windows 8. Please install correct version of system and activate it with the key.