initial load files in windows 2000

Hi Satish,
The following are the list of files that get loaded in Windows NT architecture.
1) Heart of Windows and a way to 0x21 Interrupt kingdom is command.com
2) Status of memory: himem.sys
3) I/O devices file: io.sys
4) Extended memory mapper file: EM386.sys
5) Automated System Recovery Files
6) NTLDR.EXE (NT Loader)
7) HAL.DLL (Hardware Abstraction Layer)

some more critical files that can be seen are visible when you hit F8 and boot in SafeMode with Command and Networking support.