Microsoft KB Archive/304771

= 64-Bit Programs Have Higher Priority on 64-Bit Computers for File Extension Activation =

Article ID: 304771

Article Last Modified on 12/1/2007

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APPLIES TO


 * Microsoft Windows XP Professional x64 Edition
 * Microsoft Windows Advanced Server, Limited Edition

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This article was previously published under Q304771



SYMPTOMS
When an administrator deploys a 32-bit program (by using file extension activation through Software Installation policies) and also deploys a 64-bit application by using file extension activation, the end user always receives the 64-bit program if the end user is on a 64-bit computer.



CAUSE
This behavior occurs because even if the administrator explicitly sets the 32-bit program as first in the list for that extension in the application deployment editor, the 64-bit program still has priority over the 32-bit program. 64-bit programs are going to always be preferred over 32-bit programs for file extension activation on a 64-bit computer.



STATUS
This behavior is by design.



MORE INFORMATION
For more information about Software Installation policies, please see the following &quot;Software Installation and Maintenance&quot; whitepaper:

http://www.microsoft.com/technet/prodtechnol/windows2000serv/maintain/featusability/inmnwp.mspx

Keywords: kbenv kbprb kbui KB304771

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