.SLUPKG-MS File Extension
File TypeXrML Digital License Package
What is an SLUPKG-MS file?
Software license file used by Windows; contains a digital license used to verify that a software install or upgrade has been purchased; may also contain software rights and conditions information; often seen when upgrading versions of Windows, such as from Windows Vista Home to Vista Ultimate.
SLUPKG-MS files are created using the eXtensible rights Markup Language (XrML) standard.