I have a two TB WD External HD (MY Book) that when I go into Computer I don't see it but I see all my other drives. However I can go into Disk Manager and right mouse click the drive and open and there it is. I can access it but why can't I see it in Computer with the other drives?
Looks like you are right about the Hidden drives. I suppose that is what I get for taking Microsoft literally. It doesn't even apply to CD/DVDs, just card readers and like devices...
Does a My Book have any type of proprietary software?