Cumulative Update 1 for Microsoft Application Virtualization 4.5

This article describes Microsoft Application Virtualization 4.5 Cumulative Update 1 (App-V 4.5 CU1). This package provides the latest updates to Microsoft Application Virtualization 4.5.

This cumulative update contains the following changes:

• Support for Windows 7 Beta and Windows Server 2008 R2 Beta
  App-V 4.5 CU1 addresses compatibility issues with Windows 7 Beta and Windows Server 2008 R2 Beta. Support will be provided for blocking issues that prevent App-V 4.5 CU1 from running in a test environment on pre-RTM versions of Windows 7. This change helps make sure that your virtual applications can run successfully in a test environment in which compatibility between App-V 4.5 Client and Windows 7 Beta is required.
  
  Note Running App-V 4.5 CU1 on any version of Windows 7 or Windows Server 2008 R2 in a live operating environment is not supported.
• Improved support for sequencing the Microsoft .NET Framework
  App-V 4.5 CU1 addresses previous issues with sequencing the .NET Framework 3.5 and earlier versions on Windows XP Service Pack 2 (SP2) and later versions.
  
  For more information about the new capabilities, visit the following Microsoft Web site:
  http://go.microsoft.com/fwlink/?LinkID=123412 (http://go.microsoft.com/fwlink/?LinkID=123412)
• Customer feedback and hotfix rollup
  App-V 4.5 CU1 also includes a rollup of fixes to address issues that have been found in the App-V 4.5 RTM release. This cumulative update includes a combination of known issues and customer feedback from our internal teams, partners, and customers who are using App-V 4.5.
• In addition to stability improvements, this update addresses the following issues:
  • When you try to set the default value of a registry key by using the REGVALUE OSD element, you receive an error that the OSD file is formatted incorrectly.
  • When you try to open a small application package that has been compressed, it may not start, and you may receive a "0A-00000163" error. Typically, the application package is less than 1 megabyte (MB).
  • When you open a 16-bit application, you cannot access files in the virtual file system. This causes a start failure.
• This cumulative update also includes a rollup that contains the following hotfix:
  
  961473  (http://support.microsoft.com/kb/961473/ ) Hotfix Package 3 for Microsoft Application Virtualization 4.5: January 2009

Known issues

For more information about known issues, visit the following Microsoft Web site:

How to obtain App-V 4.5 CU1

Beginning in early April, visit your volume licensing or subscription site for Microsoft Application Virtualization to download App-V 4.5 CU1.