Sevrach, I think I understand what you guys are saying.. Please correct me is I'm wrong. I'm going to put this in non geek speak. (sorry but I have never messed with re-building an OS or slipstreaming -anything like that- Just ghosting drives) Since there is no way to safely remove the bundled software from my install disks, the work around is to extract the key and oembios files from my disks/system, and use the info on that page ( http://www.msfn.org/board/index.php?showtopic=63258 ) To build a fresh copy of the OS (using another copy of Media Center 2005) that will install and activate just as cleanly as the HP disks do with my system.. I assume this is because the oembios files have information about my Motherboard and bios and their settings that is critical to the correct installation of the OS..?? Is this correct? If this is correct, therein lies the problem. I cannot afford to purchase a new copy of the OS. Thats why I wanted to strip and re-build my OS from the install disks I already have. Well, also, thats not exactly true... A friend has a 'generic' copy of media center 2005 But I didn't want to try to install that because it seems it does not have 'some' of the things I do want to keep.. For instance, my MCE 2005 came with not only the needed Sonic Encoders that all MCE's need but is came with Sonic CD/DVD Burning software also. My friends does not have this software, only the encoders. I do not know why, I assumed the burning software itself (not the encoders) was added by HP. This made me wonder what other added software I want to keep and what I didn't want. I was kinda of hoping to get a list of the bundled HP software that they themselves added, and be able to pick and choose what to keep then rebuild the install disks...providing of course there was an easy way to do this. I have compared the running processes for my machine and his, and his uses lots less. I assume my machine is running so many more processes due to so much HP bundled software running. He runs about 30 to 35 processes, and I run about 40 to 55 - I have seen this go up to 80, which is unheard of in my book. This is one major problem I sought to correct by rebuilding the OS with some or most unwanted bundled software removed. Also, the less processes running the more system resources and memory I have to do the jobs at hand, as well as makes it easier to know when a process starts running due to a virus or other malware. Like how they teach a cashier to spot counterfeit bills.. They teach you to get to know the real bills so well that when a fake bill pops up, you can easily spot it. Perhaps I'm wanting to go about fixing my problems the wrong way? Any other thoughts are appreciated. John