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ITsVISTA KB-Link: KB949545

An update is available to resolve an issue in which the Wusa.exe tool returns a “1 (S_FALSE)” error code in Windows Vista and in Windows Server 2008

In Windows Vista and in Windows Server 2008, software updates use a new technology to install .msu files. To manually install .msu files in a Windows Vista or Windows Server 2008 environment, you must have the Wusa.exe tool installed. However, this tool returns a “1 (S_FALSE)” error code when either of the following conditions is true:

  • You try to install a software update that is already installed on the computer.
  • You try to install a software update that does not apply to the computer.
There is a download that resolves this issue.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB949545.

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