When you install an .msu update package on a computer that is running Windows Vista, you may receive the following error message:

The Windows Modules Installer must be updated before you can install this package. Please update the Windows Modules Installer on the computer, then retry Setup.

When you use a script to install the .msu update package, the installation fails. When this problem occurs, the Wusa.exe process returns error code 0×800f0823.

When you try to extract and to view the contents of a Microsoft Update Standalone Package (MSU) for Windows Vista, you cannot extract the files from the MSU.

For example, one of the following issues may occur:

• If you try to use the /x command-line switch at a command prompt to extract the file on a Windows Vista-based computer, a dialog box that contains command-line help for the MSU opens.
• If you try to open the file on a computer that is not running Windows Vista, you cannot open the file. Instead, Windows prompts you to locate the program that created the file.