How many key processes in WinXP system

Some people ask how many key processes Windows XP has. The following describes the most basic system processes of Windows XP (that is, these processes are the basic conditions for the system to run. With these processes, the system can run normally. )
smss.exe Session Manager
csrss.exe Subsystem Server Process
winlogon.exe Admin User Login
services.exe Contains Many System Services
lsass.exe Manage IP Security Policy and Startup ISAKMP/Oakley (IKE) and IP security drivers. (System Services)
Generate session keys and grant service tickets for interactive client/server authentication. (System Services)
svchost.exe contains many system services
svchost.exe
SPOOLSV.EXE Loads files into memory for later printing. (System Services)
explorer.exe Explorer
internat.exe Pinyin icon in the tray area
Additional system processes (these processes are not necessary, you can increase or decrease through the Service Manager as needed) )
mstask.exe Allows the program to run at the specified time. (System Services)
regsvc.exe Allows remote registry operations. (System Services)
winmgmt.exe Provides system management information (system services).
inetinfo.exe provides FTP connection and management through the management unit of Internet Information Services. (System Services)
tlntsvr.exe Allows remote users to log in to the system and run the console program using the command line. (System Services)
Allows management of Web and FTP services through the snap-in of Internet Information Services. (System Services)
tftpd.exe implements the TFTP Internet standard. This standard does not require a username and password. Part of the remote installation service. (System Services)
termsrv.exe Provides a multi-session environment that allows client devices to access virtual Windows 2000 Professional desktop sessions and Windows-based programs running on the server. (System Services)
dns.exe Answers queries and update requests for Domain Name System (DNS) names. (System Services)
In summary, these processes must be turned on. Do not use process killers to kill these processes.