Troubleshoot an issue that IIS cannot install-replication error-Error code 0X4B8

Today I downloaded a IIS5.1 installation package from the Internet, but could not use the Control Panel----> Add or Remove Programs-----> Click Add or Remove Windows Components--> Select Internet Information Services to add IIS components, prompting Unable to copy STAXMEM.DLL "... But the file clearly exists, cancel into the next, and there are n such prompts, the last pop-up "cannot copy one or more files, error code 0x4b8", can only generate an Internet Information Services icon, but double-click Pop-up can not find the file. This is what I found on the internet, the test has been successful:
Start > Run > Enter CMD > then enter the following command: esentutl/p%windir%/security/database/secedit.sdb

And then install it again, OK.
Microsoft (R) Windows (TM) Database Utilities
Version 5.1
Copyright (C) Microsoft Corporation. All Rights Reserved. Initiating REPAIR mode ...
Scanning Status (% complete) 0 10 20 30 40 50 60 70 80 90 100
|----|----|----|----|----|----|----|----|----|----|
It is recommended so you immediately perform a full backup
of this database. IF you restore a backup made before the
Repair, the database would be rolled the
  It is in the time of this backup. Operation completed successfully in 10.266 seconds. One of the "esentutl/p%windir%/security/database/secedit.sdb" means to use a database that comes with Windows XP utility- Esentutl.exe to repair a process display for the local security database (%WINDIR%/SECURITY/DATABASE/SECEDIT.SDB). The "/p" parameter in the statement "esentutl/p%windir%/security/database/secedit.sdb" is used to fix the specified database file. Ntdsutil.exe is a command-line tool that provides management facilities for Active Directory. Using Ntdsutil.exe, you can perform database maintenance, management, and control of single host operations in Active Directory, and delete the metadata that is left when a domain controller is removed from the network without proper uninstallation. This tool is designed to be used by experienced administrators.