FSX restarts my pc

I know it's only a demo but I'm affraid the retail version will do the same thing.
It restarts the computer 5-10 seconds after loading the game. I remember fs2004 doing this with the onboard VIA/S3G Unichrome IGP but I now have a Sapphire ATI 9600 PRO w/256mb. I was messing around in the registry and found drivers from the old onboard card. I reinstalled Windows XP just in case but have not tried it since.
Just for the record, has anyone else experience this problem? I want to buy the game the day it comes out but I'd hate to keep having this issues. It doesn't even give me time to fly around to see what it's like.
Thanks in advance,
Selby
It restarts the computer 5-10 seconds after loading the game. I remember fs2004 doing this with the onboard VIA/S3G Unichrome IGP but I now have a Sapphire ATI 9600 PRO w/256mb. I was messing around in the registry and found drivers from the old onboard card. I reinstalled Windows XP just in case but have not tried it since.
Just for the record, has anyone else experience this problem? I want to buy the game the day it comes out but I'd hate to keep having this issues. It doesn't even give me time to fly around to see what it's like.
Thanks in advance,
Selby