解决：IIS的：DCOM 遇到错误“重叠 I/O 操作在进行中&nbs

也可以解决在HTTP访问网站的时候出现HTTP500错误的情况；

根据以住经验是因为IUSER_COMPUTER/IWAM_COMPUTER两个帐户的的密码不同步造成的；
在应用程序日志和系统日志中出现如下错误：

事件类型: 警告
事件来源: W3SVC
事件种类: 无
事件 ID: 36
日期: 2005-1-19
事件: 9:25:52
用户: N/A
计算机: SOFTWARE
描述:
服务器未能转入应用程序 '/LM/W3SVC/1/ROOT'。错误是 '因为配置类型不正确，系统无法开始服务器进程。请检查用户名和密码。
'。
若要获取关于此消息的更多的信息，请访问 Microsoft 联机支持站点: http://www.microsoft.com/contentredirect.asp 。

事件类型: 错误
事件来源: DCOM
事件种类: 无
事件 ID: 10004
日期: 2005-1-19
事件: 9:25:52
用户: N/A
计算机: SOFTWARE
描述:
DCOM 遇到错误“重叠 I/O 操作在进行中。 ”并且无法登录到 .IWAM_SOFTWARE 上以运行服务器:
{3D14228D-FBE1-11D0-995D-00C04FD919C1}

解决方案：

RESOLUTION
To resolve this issue, reset the passwords for the IUSR and the IWAM accounts so that they are the same in both the Internet Information Services (IIS) metabase and in the local accounts directory. To do this, follow these steps: 1. Click Start, point to Programs, point to Administrative Tools, and then click Computer Management.
2. Under System Tools, click Local Users and Groups, and then click Users.
3. Right-click IUSR_ComputerName, and then click Set Password.
4. Click Proceed.
5. Type the password in the New password box and in the Confirm password box, and then click OK.
6. Right-click IWAM_ComputerName, and then click Set Password.
7. Click Proceed.
8. Type the password in the New password box and in the Confirm password box, and then click OK.
9. Quit Computer Management.
10. Click Start, and then click Run.
11. In the Open box, type cmd and then click OK.
12. Type cd drive:inetpubadminscripts, where drive is the drive where Windows is installed, and then press ENTER.
13. To reset the password for the IUSR_ComputerName account, type the following command (where password is the password that you set in step 5), and then press ENTER:
cscript.exe adsutil.vbs set w3svc/anonymoususerpass "password"
14. To reset the password for the IWAM_ComputerName account, type the following command (where password is the password that you set in step 8), and then press ENTER:
cscript.exe adsutil.vbs set w3svc/wamuserpass "password"

http://support.microsoft.com/default.aspx?scid=kb;en-us;822699

附加: 还要执行如下command

C:InetpubAdminScripts>cscript.exe synciwam.vbs -v
Microsoft (R) Windows Script Host Version 5.6
版权所有(C) Microsoft Corporation 1996-2001。保留所有权利。

IIS Applications Defined:
Name, AppIsolated, Package ID
w3svc, 0, {3D14228C-FBE1-11d0-995D-00C04FD919C1}
Root, 2,
TraFaxWeb, 2,
TraFaxWeb1, 2,
autoupdate, 2,
SUSAdmin, 2,

Out of process applications defined:
Count: 1
{3D14228D-FBE1-11d0-995D-00C04FD919C1}

Updating Applications:
Name: IIS Out-Of-Process Pooled Applications Key: {3D14228D-FBE1-11D0-995D-00C04
FD919C1}

C:InetpubAdminScripts>

好了，再试一下，是不是好了？呵~呵~就这么解单。