When you (as a network administrator) or one of your users tries to install Office XP SP3, you may receive the following error message:

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This problem may occur when the following conditions are true:

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You have Microsoft Office XP Service Pack 1 or Microsoft Office XP Service Pack 2 installed and updated from an administrative installation point.

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You try to update your Office XP installation from one of the following Microsoft Web sites: • Microsoft Office Update Web site: http://office.microsoft.com/en-us/downloads/FX101321101033.aspx (http://office.microsoft.com/en-us/downloads/FX101321101033.aspx) • Microsoft Download Center: http://www.microsoft.com/downloads/search.aspx (http://www.microsoft.com/downloads/search.aspx) Note The Microsoft Office XP updates from these Microsoft Web sites are binary updates.

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To resolve this problem, use one of the following methods.

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Method 1: Use the Office XP Service Pack 3 full-file update

You can use the Office XP Service Pack 3 full-file update to update your administrative installation point or an individual computer (client) that has Office XP installed.

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

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Method 2: Use a new RTM-base level administrative installation point

If you, as the network administrator, no longer want to maintain your Office XP administrative installation point with current service packs and updates, create a new Office XP installation point at the Office XP RTM-base level.

After you install Office XP to a client computer from your new Office XP RTM-base administrative installation point, you can use then use the binary update from one of the Microsoft Web sites that is listed in the "Cause" section of this article.

For additional information about how to create a new Administrative Installation Point, click the following article number to view the article in the Microsoft Knowledge Base:

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Client updates, such as Office XP Service Pack 2 and earlier, could be successfully installed on an Office XP client installation if the full-file administrative update had been installed on the administrative installation point and the client computer had been updated from the administrative installation point.

With Microsoft Office XP Service Pack 3, Microsoft changed the way the binary update is authored so that the Office XP Service Pack 3 client (binary) update will install directly over the RTM-level version (10.0.2627) of Office XP.

Because of this change, the Office XP Service Pack 3 binary update will not install successfully on a computer that has either Office XP Service Pack 1 (SP1) or Office XP Service Pack 2 (SP2) installed from an administrative installation point and recached on the local computer (client). This problem occurs because Office XP Service Pack 3 must have version 10.0.2627 (RTM-level) of Office XP installed.

Note The Office XP Service Pack 3 (SP3) full file update will install correctly over an Office XP RTM-level, Office XP Service Pack 1 (SP1), and Office XP Service Pack 2 (SP2) when Office SP3 is applied to an administrative installation point.

Troubleshooting notes

The following Ohotfix verbose log shows an error 2749 with an error code of 1642 at the end of the log entry:

MSI (s) (F8:64): Looking for storage transform: 7TTo7U
MSI (s) (F8:64): Validating transform '7TTo7U' with validation bits 0x122
MSI (s) (F8:64): Note: 1: 2749 2: 7TTo7U 3: C:\WINDOWS\Installer\3b569.msi 4: 10.0.2627.01 5: 10.0.4330.0 
MSI (s) (F8:64): 1: 2749 2: 7TTo7U 3: C:\WINDOWS\Installer\3b569.msi 4: 10.0.2627.01 5: 10.0.4330.0 
(Expected version is 10.0.2627, version found is 10.0.4330.0.)

The following Ohotfix log entry shows error code 1642 at the end of the log:

The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded 
may be missing, or the upgrade patch may update a different version of the program. Verify that the program 
to be upgraded exists on your computer and that you have the correct upgrade patch.
C:\DOCUME~1\username.NOR\LOCALS~1\Temp\IXP000.TMP\MAINSP3op.msp
MSI (s) (F8:64): Attempting to delete file C:\WINDOWS\Installer\22879.msp
MSI (s) (F8:64): MainEngineThread is returning 1642
MSI (c) (50:40): Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  
Counter after decrement: -1
MSI (c) (50:40): MainEngineThread is returning 1642

For additional information about how to use the Microsoft Office XP installation log files to troubleshoot Office Setup issues, click the following article number to view the article in the Microsoft Knowledge Base:

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

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