Ok, ignore the system restore. Go to Add\Remove programs in your control panel and check the box at the top to show your updates and uninstall the intel update.

As I mentioned in my previous post, people running server 2003 have had the same problem as you with the re-boot and it concerns that particular driver. After disabling it they no longer had the same problem.

If you can't remove it refer to my previous suggestion and change the start value.

Regards

Martin