In case of windows 7 if you try to restore the backups files you have created in windows xp, it will not work as Removable Storage Manager (RSM) is no longer included in Windows 7 or in Windows Server 2008 R2 which previously allowed the backups to be restored. For all those people who had just migrated from windows xp to windows 7 are facing this issue from some time.
So in order to perform the restore from a tape device for the following operating system including Windows XP, Windows Server 2003, Windows Vista and Windows Server 2008 you will need to download the update KB974674 for windows 7 – which is named as Windows NT Backup Restore Utility is available through the Microsoft Download Center
Windows NT Backup Restore Utility allows you to restore backups that are made on Windows XP and on Windows Server 2003 to all those PC which are running Windows 7 or Windows Server 2008 R2.
Note: You will need to have genuine windows 7 to download this utility as it requires validation.