Link removed. How do I get the OEM certificate? Its in the operating system. If you want to figure out how to do this type of thing exactly, you are going to have to do some searching. Users here may end up giving you generic information because this topic (while it does have its legitimate uses) treads very close to the "no bypassing activation" rule we have on the forum. So let's go back to your original problem, which didn't really have any hard info in your first post to go on. Have you already started something or are you looking for ideas? Where are you getting this HP image from, is it on the recovery media or from the recovery partition? Okey. I want to have some ideas. I use the HP recovery installation media that's shipped with the computer and sysprep and capture that installation so it's fit our inviorement. Earlier it has worked fine with that procedure and I use WDS to deploy my HP images. Now I got error everytime after I sysprep and capture the image. I got the error when I boot up the computer after the process. I have tried to recreate the unattended.xml file with WSIM and validated the file. My thought here is that I want to use MDT 2010 to deploy my installations instead but is that possible to do that when I modify an installation done with hp recovery media? I tried with sysprep and capture from MDT and got the same error after the process when I booted up the computer...