Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message

X250 BIOS entries "OA3 ID" and "OA2"

X230 through X280, plus X390 series specific matters only
Post Reply
Admin Emeritus
Admin Emeritus
Posts: 20989
Joined: Mon Sep 18, 2006 5:17 am
Location: Dublin, Éire

X250 BIOS entries "OA3 ID" and "OA2"

#1 Post by RealBlackStuff » Fri Apr 19, 2019 7:11 am

In the X250 BIOS there are a few new/unknown fields on the first page:
OA3 ID xxxxxxxxxxxxx
OA2 Yes

Anybody know what these OAx entries are for?
Lovely day for a Guinness! (the Real Black Stuff). And pigs CAN fly!
Check out The Boardroom for Parts, Mods and Other Services.

"Computers don't lie, but liars can compute." (Terry Hayes's I Am Pilgrim)

Junior Member
Junior Member
Posts: 461
Joined: Sun Apr 15, 2018 7:15 am
Location: Singapore

Re: X250 BIOS entries "OA3 ID" and "OA2"

#2 Post by Screamer » Fri Apr 19, 2019 10:23 am

I believe that it might be related to SLIC, since OA stands for 'OEM activation'.

OA2.x is meant for activating Windows Vista and 7, if I am not wrong. OA3.x on the other hand, is meant for activating either Windows 8 or Windows 8.1.

Junior Member
Junior Member
Posts: 326
Joined: Wed Dec 27, 2017 8:59 am

Re: X250 BIOS entries "OA3 ID" and "OA2"

#3 Post by madicetea » Sat Apr 20, 2019 5:28 pm

Indeed, Screamer, your detective work knows no bounds.

One of a few official docs pages from Microsoft also states (and to no one's surprise) that W10 keys can also be embedded with OA3 - https://support.microsoft.com/en-us/hel ... nd-later-b.

OA3 (and sometimes extensive OA3 tables with multiple licenses) are slipstreamed (added as a layer on top of) the regular factory golden master images by the OEM companies and IT professionals with the Active Directory Kit (ADK). I've seen it used before in medium and larger companies as a way to have Out of the Box (OOTB) activations of Enterprise or Professional versions of Windows for their employees.

It's interesting to see the difference of methodologies with the tables as well. Because OA2 (SLICv2 - v1 was used in XP and Vista) is a standard 'known' table and an (also now known to the public) OEM signing key, it's rather straightforward to inject SLIC2 tables for Windows 7 Pro or Ultimate into a machine, and they are the same across the entire OEM (all Lenovo is the same, but Lenovo OA2.x differs from Dell OA2.x) -- hence, the 'Yes' you are seeing.

OA3 for Windows 8 and later (iirc) is injecting the key itself and then salting it for the ID you are seeing? Although there is a command available with ADK windows imaging tools to verify what the key(s) are and if the version of windows currently running on the computer can be/was activated through the BIOS table.
Greetings from California (and 時々日本),
, Thinkpad Enthusiast

Daily Driver Thinkpads: X250 16gb 3TB FHD, X61 T9300 SXGA+
Museum Piece: PC110 20MB
Past: 701Cs German, 535/X, 760E/XL, i-series 12/14xx, piano s30, R60e, X60, X61, T60, T61, X200 P8700, x2001 AFFS i5-530, X121e

Post Reply
  • Similar Topics
    Last post

Return to “ThinkPad X230-X280 / X390 Series”

Who is online

Users browsing this forum: No registered users and 10 guests