This one has me really baffled. I purchased Media Center XP 2005 at a computer show. It's an OEM package. The set of disks is different than XP Professional. There are 2 installation disks and another which has updates for the 2005 version. The problem I'm having is that when I install, I reach a point where they ask for SP 2. I put in the updates disk and then I get a message that "i386" is missing. I have tried everything short of pulling my hair out. I don't want to do that because it's getting kind of thin up there. I called the dealer I purchased from, and they were no help, except they offered to exchange the disk set for a new one. Well, they did that and guess what, same problem. If I cancel installing the service pack it appears like it is installing the rest of Windows XP but it's not. It will boot up into Windows and I can enter into the Media Center portion of the operating system, but there is no Internet Explorer or other things which you would usually expect to see. I can't install any other programs. I thought maybe I'd try installing Firefox and download the updates that way but it was no go. It won't install anything. I've tried installing this on 2 separate computers. One has an AMD Sempron and the other has an AMD 64. Both are using Epox mother boards, which work very well with XP Professional. Any help would be greatly appreciated.