Problem with Lite-on 411S and Sonic MyDVD

Recently purchased the above drive, and it came with Sonic software.

My problem being that when I create a DVD I get all the way through the wizard adding my movies in etc. and when I hit the ‘burn’ button it starts processing the files, and just at the point where it tries to burn, the computer reboots itself…

I’m really stuck with this - does anyone know what might be causing it or has anyone else had this problem?

The drive works fine burning data with Nero, so I don’t think it’s hardware related.