I am running Windows 2000 and it had reboot twice of my OS in a day. There is no error or warning, the computer just reboots itself. This is the error I see in the System Event Log: The computer has rebooted from a bugcheck. The bugcheck was: 0x0000001e (0xc0000005, 0xbfe0b8da, 0x00000000, 0x44454148). Microsoft Windows 2000 [v15.2195]. A dump was saved in: C:\WINNT\Minidump\Mini042909-01.dmp.