BackOffice Small Business Server 4.5:

SUPPORT SOLUTION:

When you install Small Business Server (SBS) 4.5 or upgrade to SBS 4.5 from SBS 4.0, you may receive one or more of the following error messages when you install the client programs:

MDACSET - illegal operationmdacset caused an invalid pagefault in module mdacset.exe at 015f:00403072

If you receive an error message and click OK, one of the following things occurs:

The following error message is displayed:
Error Creating process
c:\windows\temp\ixp000.tmp\msinst.exe /i instmsi.msi
reboot=Really Suppress /q.
Reason: %1 is not a valid win32 application.
The SBS Setup program indicates that the client programs were not installed properly.NOTE: In either situation, SBS clients are unable to successfully install Microsoft Office 2000 programs.

This behavior can occur if the Microsoft Installer files are corrupted or are missing certain components.
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may
require you to reinstall your operating system. Microsoft cannot guarantee that you can solve
problems that result from using Registry Editor incorrectly. Use Registry Editor at your own
risk.
To resolve this issue:

Verify that the System account has Full Control permissions on the following folders:C:Winnt.sbsClientAppsThe root of the drive where the ClientApps folder is installed (if it is not drive C).NOTE: The System account is not part of the Everyone group. If Full Control permissions are specified for the Everyone group but the System account is not specifically mentioned, you should add the System account to the permissions list.
Start Registry Editor (Regedt32.exe) and locate the following registry key:
HKEY_LOCAL_MACHINE\System\Current Control Set\Services\MSIServer
Locate the Image Path value in this key. The correct value is:
C:\Winnt.sbs\System32\Msiexec.exe /v
Make sure the following two files exist in this folder:Msiexec.exeMsi.dll

If the Microsoft Installer files are corrupted, use the following steps:

Start the client in MS-DOS mode.Rename the Msi.dll, Msihnd.dll, and Msiexec.exe files.Restart the client in Normal mode.Run Instmsi.exe from the Msi folder on the Outlook 2000 CD-ROM.Run Outlook 2000 Setup directly from the CD-ROM.

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

290301 

(http://support.microsoft.com/kb/290301/
)

Description of the Windows Installer CleanUp Utility

For File Repair and Data Recovery, visit File Repair / Data Recovery