Are you using Windows XP? And when you reboot does it ask you if you want to send information to Microsoft?
If so, click on send. If Microsoft has any information on the problem, they will tell what driver caused your computer to crash.
This has worked for me several times. I last one being that every time I would play UT2004, I would get booted back to Windows desktop. After sending the report a note came back to me stating that my DirectCD caused it to crash. So I actually unloaded DirectCD and put an older version on and everything is back to working perfectly.
Believe it or not, Microsoft actually helps out sometimes.
Of course if it does ask you to send information, then I would start with a driver for the DVD drive. Also look for updates for your DVD writing software, i.e. Roxio, Nero or what ever you use.
Soyo Dragon Ultra Platinum Edition powered by a P4 3.06GHz w/HT @ 533FSB
ATI Radeon X800Pro 256DDR <---Yeah!!! I finally got it!!!
1024MB PC3200, Creative Audigy LS, 2 x 40GB = 80GB RAID 0
Windows XP Pro, DOOM 3, CS, UT2004, BF1942 RtoR, CNC Generals
Finished Half-Life 2!!!!!!!!!!