"Disk Error -- Reserved Error (-1601)" error message when you try to install an Office update

Support for Office 2003 has ended

Microsoft ended support for Office 2003 on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article was previously published under Q321497
This article has been archived. It is offered "as is" and will no longer be updated.
When you try to install an Office update, you may receive an error message similar to the following:
Disk Error -- Reserved error (-1601)

The Windows Installer service could not be accessed. Contact your support personnel to verify that the Windows Installer service is properly registered.
The log file for this error message is similar to the following:

Applying patches to product {90280409-6000-11D3-8CFE-0050048383C9}
Microsoft Office XP Professional with FrontPage
Applying patch
Command line:
The update ended with status code: 1601.
Finished processing the update on 6/28/2001 at 11:41:26.
Encountered error 1601 while updating.
The Windows Installer log file is similar to the following:

Calling process: C:\DOCUME~1\branber\LOCALS~1\Temp\IXP001.TMP\ohotfix.exe ===MSI (c) (F4:90): Resetting cached policy values
MSI (c) (F4:90): Machine policy value 'Debug' is 0
MSI (c) (F4:90): ******* RunEngine:
******* Product: {90280409-6000-11D3-8CFE-0050048383C9}
******* Action:
******* CommandLine: **********
MSI (c) (F4:90): Client-side and UI is none or basic: Running entire install on the server.
MSI (c) (F4:90): Grabbed execution mutex.
MSI (c) (F4:90): Cloaking enabled.
MSI (c) (F4:90): Incrementing counter to disable shutdown. Counter afterincrement: 0
MSI (c) (F4:90): Decrementing counter to disable shutdown. If counter >= 0,shutdown will be denied. Counter after decrement: -1
MSI (c) (F4:90): MainEngineThread is returning 1601
To resolve this problem, shut down the Windows Installer service and then re-register it. This makes sure that the Windows Installer engine functions properly. To do this, follow these steps:
  1. Click Start, and then click Run.
  2. In the Open box, type msiexec /unreg, and then click OK.
  3. When this process is complete, click Start, and then click Run.
  4. In the Open box, type msiexec /regserver, and then click OK.
  5. When this process is complete, reinstall the update.
prb OFFXP OFF2003

Article ID: 321497 - Last Review: 12/07/2015 10:42:44 - Revision: 2.10

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