The error for NOTSKRNL.EXE

When I shut down the Windows 2000 server, the BLUE screen will appear and show the error for NTOSKRNL.EXE, the full error message is "Stop: 0x00000050 (0xFFD5C7A4, 0x00000001, 0x8042D9EF, 0x00000000) Address 8042D9EF base at 80400000, Datestamp 3ee650b3-ntoskrnl.exe" and need to waiting for dump the memory to handdisk, I have no idea what happen and what meanings for the above message, please help. The server is running Windows 2000 Server SP4.