OEM Licence key from the UEFI BIOS

OEMs have embedded your licence key into the MSDM table inside the BIOS.

Scenarios

Internal HDD has failed or has been damaged. Due to some reason, the OEM partition table has been removed/lost. Applies to

  • Windows 8
  • Windows 8.1
  • Windows 10

Windows 8.1 Issues

For some reason the Windows 8.1 installation does not accept a Windows 8 licence key.

  • Windows 8.1 – 334NH-RXG76-64THK-C7CKG-D3VPT
  • Windows 8.1 Pro – XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB

If your laptop is a Windows 8 OEM system, use these keys to initially install Windows 8.1, post-installation and once on-line; Activate Windows 8.1 using your Windows 8 embedded key.

Recover the OEM Licence Key using CLI / Linux.

I used an Xubuntu LiveUSB to do this, opened up Terminal and type in this command below,

$ sudo hd /sys/firmware/acpi/tables/MSDM

Which resulted in this,

xubuntu@xubuntu:~$ sudo hd /sys/firmware/acpi/tables/MSDM
00000000  4d 53 44 4d 55 00 00 00  03 ad 41 43 52 53 59 53  |MSDMU.....ACRSYS|
00000010  41 43 52 50 52 44 43 54  01 00 00 00 31 30 32 35  |ACRPRDCT....1025|
00000020  00 00 04 00 01 00 00 00  00 00 00 00 01 00 00 00  |................|
00000030  00 00 00 00 1d 00 00 00  ** ** ** ** ** ** ** **  |........XXXX-XXX|
00000040  ** ** ** ** ** ** ** **  ** ** ** ** ** ** ** **  |XXX-XXXXX-XXXXX-|
00000050  ** ** ** ** **                                    |XXXXX|
00000055

The X’s are the Windows 8 OEM Embedded Licence Key.

Key Recovery within WinPE or Windows Environment

Open a CMD window with Administrative Privilages

Enter this command below;

powershell "(Get-WmiObject -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey" 

Once entered it should produce the UEFI Embedded Windows Licence Key.

Windows Tools

Microsoft only started to embed OEM Licences into the UEFI of laptops recently, starting with Windows 8. Systems operating Windows 7, Vista or XP do not have embedded licencing such as this.