I searched to find a related sticky thread about my question above but I couldn't , most probably there are some usefull information in post messages but they are difficult to find. First of all, I thank to guys giving reply to my MEDION bios mod request on page 2139 phoenix mod reuests. I downloaded the file. It includes flash file and some 2 others under the modified bios folder. There are other files under another folder with names ; MEDION-MEDION-2.1.XRM-MS Acpitbls.rw ********* I searched the site and found some information under " mode your own bios" thread as below; The XRM-MS file is a certificate. But you must have modded bios or bios with slic 2.1 tables from ASUS. Then you can add it to your computer with this command: slmgr.vbs -ilc x:\ASUS.XRM-MS (put the right destination for example C:\BIOS\ASUS.XRM-MS) Also you have to add a SLP product key with this command: slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX ********** So in conclusion , for the safest sake , what is correct order of this job , pls confirm and edit below as necessary. To my understanding , it is as below. - Install the Win7 to your PC ( in my case Win 7 ultimate RTM ) - Apply the modded bios as instructed in modded bios file from mydigitallife site , then you may check its SLIC with slic toolkit - Then run the certificate file ( MEDION-MEDION-2.1.XRM-MS ) in my case with admin rigths slmgr.vbs -ilc X:MEDION-MEDION-2.1.XRM-MS ( X is path of certicate file) - Then also apply the license key with command line slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX What should be the XXXX-XXX.... here , should it be somewhat in coincidence wit above XMS-MS certificate or could be any other brand's key which could be found on net , or should it be a Medion allocated Win 7 ultimate key?