无法复制iisapp.vbs或staxmem.dll文件,需要sp1光盘(解决办法)

无法复制iisapp.vbs或staxmem.dll文件,需要sp1光盘,但在c:/WINDOWS/ServicePackFiles/i386下有这个文件，仍然无法安装,按如下步骤操作后,方可正常安装!
(1) 开始 > 运行 > 输入 CMD >再输入以下命令：

esentutl /p %windir%/security/database/secedit.sdb

(2) 接着屏幕上会输出如下信息:

Microsoft(R) Windows(R) Database Utilities
Version 5.2
Copyright (C) Microsoft Corporation. All Rights Reserved.

Initiating INTEGRITY mode...
Database: L:/WINDOWS/security/database/secedit.sdb
Temp. Database: TEMPINTEG2680.EDB

Checking database integrity.

Scanning Status (% complete)
0 10 20 30 40 50 60 70 80 90 100
|---|---|---|---|---|---|---|---|---|---|
...................................................
Integrity check successful.
Operation completed successfully in 0.841 seconds.
(3)插入安装盘再试一下，问题迎刃而解。

--------网上摘抄，多谢