Along with today's release of the 'Media Preview' update, Platinum will no longer run on Windows XP and Windows Server 2003 and 2003 R2 machines. We haven't supported Windows XP since January 2017 but Platinum did still function (albeit without support) on this platform.
All other machines running Windows Vista or later (Win7, Win8 and Win10) are unaffected.
Microsoft themselves long ago abandoned support for this version of Windows.