Tx very much for suggestions.
Ehem ... isn't my work.
They told me that some years ago mail server crashed.
They bought a pc with a recovery partition for the old OS.....
They installed win 2003 on the partition D without repartitioning the disk.
That's the result.
Yesterday evening I make a ghost clone and I tryed to make some partition changes with acronis disk director but without results.
Today at launch pause I make another clone of the server disk and I can make other tests.
What exactly you suggest to do with partitions?