activating windows 7 OEM way

I will start with basics of how a copy of windows gets automatically activated when installed on OEM (original equipment manufacturer) based PCs, traditionally when a copy of windows is installed you have insert your license key and activate by verifying it with Microsoft via internet or by getting a confirmation id over telephone. But with OEMs like Dell, Sony, Lenovo etc. a need was felt to get windows activated right upon installation without going through all the annoyance. With Windows XP a method called System-Locked Pre-installation (SLP) was devised. This method uses an area of BIOS to store some identification data, in SLP 1.0 the version included with XP, this was simply the name of the OEM. There are files on hard disk when windows is installed which were being matched with the value from BIOS for verification, if matched your copy gets activated. SLP 1.0 was cracked quite easily which demanded for a more complex system to be developed resulting in SLP 2.0 included with Windows Vista and SLP 2.1 shipped with Windows 7. Both methods works similarly with only a change in marker in Windows 7 based PCs. A SLP 2.1 involves checking the presence of a matching OEM-supplied key, an OEM-specific certificate and the most challenging part of the puzzle an OEM-specific ACPI_SLIC table (SLIC 2.1 table) before it can activate.

Now moving to next step, OEM-key and OEM-specific certificates were being cracked very early when a copy was leaked illegally from Lenovo, but the real hack was to bypass the SLIC table. Methods were developed commonly known as Loaders (also called the softmod) which involves loading the SLIC table in memory before the main OS loads thereby fooling the system with a fake SLIC table. These methods involves Linux based loaders and sometimes may install trozens or other malware on your PC. Other method called the hardmod also exist which modifies the BIOS and may lead to complete system damage.

We will now learn how to get your copy of windows 7 genuine without compromising the security and system itself. The first step is to check if your BIOS has a SLIC 2.1 table or not, and can be easily done using the SLIC_ToolKit can be downloaded from here. Run it and you will see the window indicating the presence of SLIC table 2.1 marked “Dump OK !   ( DELLWN09_V2.1 )”.

detecting SLIC 2.1 in BIOS

In case you don’t have version 2.1 you first need to get your BIOS updated. Now moving on to next step get the OEM certificate taking help of your friend Google. Select the one based on your OEM and move it to C:, next run the following commands after opening cmd as administrator

slmgr.vbs -ilc C:\DELL.xrm-ms

in case your OEM is DELL, next first get OEM keys also available on internet and select the one based on OS version and run the command

slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxx-xxxxx

now check your activation status by entering

slmgr.vbs -dli

hope you enjoyed the blog… !!!

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110 comments

  1. Neil Chester · November 16, 2015

    Hi, I wonder if you could help me please? I have a laptop I bought off ebay that had been upgraded from vista business to windows 7 professional, I used magic jellybean to recover the product key and I tried wiping and re-installing windows 7 professional with a USB stick I put an iso on. When I input the product key it said that it was an OEM key and would not activate. Can you tell me if I can still do this without an operating system on the laptop or is there another way around it? many thanks

  2. K4M4L · December 27, 2015

    Is this works UEFI based motherboards?

  3. Dave H · January 17, 2016

    When I try to download from your Google Drive link, Google is telling me the SLIC file has a virus and can only be downloaded by the owner.

  4. Jostarr · January 25, 2016

    I have a Dell Optipex 755 with Bios A11, Vista Business, and Slic v2.0. I can not find a working Bios Upgrade with
    SLIC 2.1. Can you provide a link?

  5. D · January 27, 2016

    I am left unclear if there any record in the bios of the flavor of windows that is supposed to be installed? Can a thinkpad with vista be upgraded by this method to win7, for example?

    Also, I have Win 7 install media given gratis to university students. Will that media work to activate an install, or do I specifically need some kind of OEM disk?

    Alternatively, I have a number of old machines here, and I want to move hard drives and windows installs between them. Given a working system, can I just clone the disk (to a larger one, for example), install that to another machine, and then run this process?

    Thanks for your work!

    Also, and possibly alternatively, I do have Win 7 install media given gratis to university students. Will that media work to activate an install, or do I specifically need some kind of OEM disk?

  6. D · January 27, 2016

    I am left unclear if there any record in the bios of the flavor of windows that is supposed to be installed? Can a thinkpad with vista be upgraded by this method to win7, for example?

    Also, I have Win 7 install media given gratis to university students. Will that media work to activate an install, or do I specifically need some kind of OEM disk?

    Alternatively, I have a number of old machines here, and I want to move hard drives and windows installs between them. Given a working system, can I just clone the disk (to a larger one, for example), install that to another machine, and then run this process?

    Thanks for your work!

  7. D · January 28, 2016

    One more question, if you don’t mind. I’ve got a bunch of Thinkpad T6x’s all but one with the most updated bios. Oddly, those with the later bios are still slp 2.0 (LENOVOTP-7I), but the one that hasn’t been updated is slp 2.1 (LENOVOTC-90). Not sure how that happened, but could I just copy the 2.1 version of the slic table over the 2.0 version?

  8. Animesh Kishore (@mask_kishore) · February 19, 2016

    Hi. Great guide first of all. Very thorough and informative.

    Here’s my situation. I had a Dell OEM Win 7 Home license. Now I want to use the same license on a new HP laptop. So, in the step where you have to install the SLP key for the manufacturer, should I load Dell or HP?

    Thanks in advance…

  9. Russ · February 25, 2016

    Many thanks for these instructions, you saved the day. God bless you.

  10. Pingback: How To Bypass Activating Windows 7 | Lalataso-1
  11. Alexandru D · April 9, 2016

    You’re a rockstar, saved me from running a repair with a different iso and a long a$$ drive.

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  13. Damon Breeden · April 22, 2016

    Nice, is there any way to do this with Windows 8/10?

  14. silversword411 · April 28, 2016

    Outstanding!!!!!! I’m quite certain I’ve searched at least 150+ sites…and never found this info, just turned licensing hell into easy street. Thank you!!!!!!!!!

  15. k13ron · May 18, 2016

    You my friend, are a legend! Works 100%

  16. Arlen Pujia · June 16, 2016

    You actually make it seem so easy with your presentation but I find this topic to be really something that I think I would never understand. It seems too complicated and very broad for me. I am looking forward for your next post, I will try to get the hang of it!

  17. t1m_h · July 15, 2016

    Excellent work, saved me from having to re-install my accidentally broken Vista…

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  32. jasper · September 15

    File : Windows Loader.exe
    CRC-32 : b4417bb9
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    Make sure hashes check out, google scratches microsofts back by returning virus infected fakes as top results

    • Dog · April 17

      Hashes are verifiable against WHAT AUTHORITY? That’s right – NONE. I’d rather trust Microsoft, and that’s saying something. If one can do the OEM Activation via SLIC table in the BIOS, then one has already paid for the OS, so no need to trust dodgy loaders.

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  36. Fred C · December 11

    I don’t understand why we are running that program to look at the SLIC information unless you are saying that the 2.1 is necessary for this to work. And I don’t know what you mean by getting the OEM certificate and moving it to the C drive. How/where do I do that? I understand the rest of it, but it still says not genuine probably because I do not have the certificate part. Thanks.

    • Fred C · December 11

      And when I run the first command I get a Windows Script Host box stating: On a computer running Microsoft Windows non-core edition, run ‘slui.exe0x2a0xBBA’ to display the error text. Error 0xBBA. Attempting to run that command gives me an error that it does not recognize that command.

  37. ODB · December 18

    To Neil Chester. Just do a google search for Windows 7 Loader 2.6.2 By Daz, or older version. You should see several places to get it, but you need to only use one that has no malware, malware is everything, Trojan, Virus ECT. Make sure when you extract the RAR, you have either, Avira, Fsecure, Bit defender, or Kaspersky as an anti-virus. Windows- DAZ loader will not flag as a virus, but people take his work and infect it. Once you have a clean one, you can use it on any version of windows Vista or 7. The reason I say this is it sounds like they used a bad key or used this program, and you can’t just use a generic OEM key without the table being injected. You can try one other thing, do a clean install of the original OS, and try key, if it doesn’t work try my suggestion with the loader to TEST the laptop and then buy a key. Even though Microsoft will NEVER know it’s injected.

  38. Phillip Coppens · January 28

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