重要！当打开MMC或者inetmgr时提示“Cannot Open xxx.msc”，就用以下解决方法，安装至少MSXML3SP4然后重起就解决问题。

http://www.ozzu.com/ftopic29639.html
http://www.computing.net/windowsxp/wwwboard/forum/135452.html


Have you installed the latest msxml parser?

>

> Try the following:

>

>

>

> 1. Navigate to http://msdn.microsoft.com/downloads/

>

> 2. Select the appropriate language for your machine

>

> 3. Search for "Microsoft XML Parser 3.0 SP4" (without quotes)

>

> 4. Click "Download files below"

>

> 5. Download and install msxml3xxx.msi (xxx represents the three letter

> acronym for the language.)

>

>

>

> Return to Windows Update and try again


run Regsvr32 "C:\WINDOWS\system32\msxml3.dll"

I can't tell you why it works, but it fixed the problem for me!