Windows x64 with BE 10d

64 bit CPUs have been out for a while, but 64 bit Windows was only released in April 2005 (http://www.microsoft.com/presspass/press/2005/apr05/04-25Winx64LaunchPR.mspx). BE 10 was released in January 2005, so predates it. As a result, Backup Exec 10 (including 10d) are not supported on 64 bit Windows for the media server.