It's possible that you are uncovering another bug. (if so, that is
much more than a bug but i'll keep to topic).
I don't think anyone here has installed X1 on Windows XP and I highly doubt it was tested by 'Cakewalk' QA.
Make sure you have hdd space which I'm sure you did. Also make sure you have administrative privileges.
Try to go into safe mode by hitting f6 during boot and then do safemode with networking. Then try installing.
The DVD could also have an error on it or it's a rare possibility it's your drive. Use your dvd writing software to check the DVD for errors. If there are, create an ISO from the disk and then mount. That could work.
It's rare, but it could actually be your CPU is conking out... basically over heating, locking up during heavy extended load. That's if the whole screen freezes. Check your bios CPU temp settings when you reboot.
Likely it's a bug though with X1.. that's where i'd put my money.