Allo Apatel and welcome to the Lockergnome forum
This is sort of inspired guesswork, as I don't have Vista, but....
If your drive is formatted as NTFS and is completely full, it's possible that Vista (if it's similar to XP) hasn't got enough space to write it's indexing files.
In WinXP, there's a hidden folder on each NTFS drive called 'System Volume Information', that contains (I think) any files covered by the various Windows protection apps, the file indexing service and possibly some System Restore stuff.
It might well be that Vista needs more space for it's stuff than XP - hence the error message.
Is it possible to hook the drive back into it's original PC and move some files to a CD or DVD??? That should free up enough space for Vista to be able to work with it