Hello, I have a brand new dell XPS 8700 with windows 7 pre-installed that I purchased from Costco. I like to play older games, so I bought a brand new copy of Windows XP to install as a dual boot option. I have correctly created a partition and when I insert the Windows XP disc in and boot from it, I get the following message -- "acpi.sys is corrupted". At thi pont, the installation fails and the system reboots into Windows 7. I have done extensive online research and seen many tutorials on how to do this, but of course, none of the videos encounter this problem. There is tons of information online about this error, but none on how to fix it in this situation. Any help would be greatly appreaciated. Thanks