help I cannot log in window in regular mode,(but i can log in sfe mode)
when I press switch on a blue screen comes up

Stop : c000021a {Fatal system Error}
The Windows Logon Process system process terminated unexpectedly with a status
0f 0xc0000022 (0x00000000 0x00000000).
The system has been shut down

Can any highhand in here can help me before I reinstall Window

Thx thx thx'

rim1818 :
ultraegg slove my problem thx thx

Here is the description for error 21A:

0xC000021A: STATUS_SYSTEM_PROCESS_TERMINATED

This occurs when Windows switches into kernel mode and a user-mode subsystem, such as Winlogon or the Client Server Runtime Subsystem (CSRSS), is compromised and security can no longer be guaranteed. Because Win XP can’t run without Winlogon or CSRSS, this is one of the few situations where the failure of a user-mode service can cause the system to stop responding. This Stop message also can occur when the computer is restarted after a system administrator has modified permissions so that the SYSTEM account no longer has adequate permissions to access system files and folders.

you can try the following options:

rerun windows xp setup from cd, then choose to install xp on the same partition, as previously installed to.

xp will recognize a previous installation, and ask if you want to Repair or Install, select Repair.
problem solved.

then install latest service pack.

this method is simpler than running recovery console, especially if you're not familiar with Recv. Console.

some more information:

Check these

Error Message: Stop c000021a {Fatal System Error} The Session Manager Initialization System Process...
http://support.microsoft.com/default.aspx?scid=kb;en-us;317189

Security Accounts Manager Initialization Failed" Error Message When You Start Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;316751

Stop 0x21a" Error Message Occurs If You Download a RIPrep Image
http://support.microsoft.com/default.aspx?scid=kb;en-us;308299

or try reinstalling windows xp

Reinstallation of XP:
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q315341

stop:c000021a 无需重装xp系统解决方法`
“stop: c000021a ”，其他信息： “The session manager initialization system process terminated unexpectedly with a status of 0xc0000022 (0x00000000 0x00000000) The system has been shut down.”
是一个严重的计算机错误，导致系统无法启动。很多论坛都有这个帖子的求助。通常解决办法是重装。微软官方网站的解决办法也是重新装系统，我最近就经历一次。耗时30小时（周六加周日），终于找到解决办法，与各位分享;
微软补丁hotfix kb890859错误
1 进入windows 修复控制台
具体方法：xp启动盘一张，光盘启动，到安装目录后按R进入，需管理员权限。
2  DIR $* 回车
3 CHDIR $NtUninstallKB890859$\spuninst 回车
4 BATCH spuninst.txt 回车
重启后禁止windows 更新 kb890859 补丁

Here is the description for error 21A:

0xC000021A: STATUS_SYSTEM_PROCESS_TERMINATED

This occurs when Windows switches into kernel mode and a user-mode subsystem, such as Winlogon or the Client Server Runtime Subsystem (CSRSS), is compromised and security can no longer be guaranteed. Because Win XP can’t run without Winlogon or CSRSS, this is one of the few situations where the failure of a user-mode service can cause the system to stop responding. This Stop message also can occur when the computer is restarted after a system administrator has modified permissions so that the SYSTEM account no longer has adequate permissions to access system files and folders.

you can try the following options:

rerun windows xp setup from cd, then choose to install xp on the same partition, as previously installed to.

xp will recognize a previous installation, and ask if you want to Repair or Install, select Repair.
problem solved.

then install latest service pack.

this method is simpler than running recovery console, especially if you're not familiar with Recv. Console.