iis的一个小问题，

今天朋友打来电话，说ii6无法启动，远程连接过去，首先提示密码过期，需要修改密码，
日志中看到的是：
Event Type:        Warning
Event Source:        W3SVC
Event Category:        None
Event ID:        1021
Date:                12/18/2006
Time:                9:00:01 PM
User:                N/A
Computer:        CIMXXX
Description:
The identity of application pool, 'FusXXXX' is invalid.  If it remains invalid when the first request for the application pool is processed, the application pool will be disabled.  The data field contains the error number.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 2e 05 07 80               ...€
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直接访问iis首页，返回的错误是
Service Unavailabe.

后来在google找到一篇文章，内容是：
I've been encountering the same error. I have added the Domain account
into "Act as part of the operating system", have added the user to the
iis_wpg, and even created a brand new pool to test this on, etc etc. I
still get the same error. With one domain user (mine) the pool runs
fine; with the one set up especially for this application/system, the
pool errors out. I am told the only difference in these IDs is that
mine has expiry passwords and the 'system' one doesnt, and that the
'system' one has to be granted permission to the devices on which it
will run (which I'm also told it has).
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联想到刚刚登录的时候的更改密码，估计可能是iis使用的域帐号密码过期导致的，于是找到iis6的application pool中的identity选项，还有default web site 的相关部分，修改后iis6正常启动