August 2009 Windows Vista and Windows Server 2008 Application Compatibility Update
Windows Vista Application Compatibility Update is a software update that addresses common application compatibility issues in Windows Vista. Microsoft regularly releases application compatibility updates for Windows Vista and for Windows Server 2008.
To immediately install the August 2009 update, click Start, point to All Programs, and then click Windows Update. In the navigation pane, click Check for updates, and then follow the steps to install all recommended updates.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB972036.