I thought I would post this. We've had two calls for this problem this week. We determined that Blackice Server with the lastest software updates was causing these servers to Save Dump and reboot every 20 minutes or so. Some would freeze up instead of reboot as well. After the program was uninstalled the machines quit rebooting. Also, make sure the service is removed, you can also just stop the service to verify the problem.
Advice given AS IS!
The computer has rebooted from a bugcheck. The bugcheck was: 0x0000000a (0x09c76674, 0x00000002, 0x00000000, 0x804ef19f). A dump was saved in: C:\\WINDOWS\\Minidump\\Mini072904-28.dmp.