Yesterday I tried installing Windows XP Professional with Service Pack 3 (x86) - CD (Danish) on a 5 year old Fujitsu Siemens laptop. I burned several cds from the iso file that matched the hashes from MSDN subscriber downloads, but the installation failed everytime right after copying the the installation files to the harddrive. I figured it might be the cd-rom drive that was acting up, so I tried installing from a USB-stick which immediately errored out saying something about an error in one of the installation files. Again - this was on a cd burnt from a vanilla MSDN iso. Finally I tried instaling the XP SP1a version that came with the computer, and the install went smoothly. So now I'm lost. Has there been compatibility problems recorded with official MSDN XP SP3isos? If anyone can help me get on the rigth path, I would be most grateful. Seems really weird, if I have to install an old XP version and upgrade it afterwards instead of installing the newest version from the start (which has worked on every other computer, I have worked on). Thanks.