installed one hdd two apprear in "my computer"

G'day , thanks in advance to any one who can help me out. A couple of days ago I installed another hdd, a 1 tg samsung. The fourth hdd for the pc, but the only 1tb.. When I go into computer management -storage devices it shows up as one hdd single partition, with one drive letter.
But when I go into "my computer" there are two images of the 1tb hard drive , and they are labled with different drive letters!. When I transferr files into the drive letter that shown in storage devices , the images both show that they are filling by the same amount.
It is the only 1 tb hdd in the machine so there is no confusion as to where the files where being put.

The system has a dual boot setup , and the 1 tb hdd and it "shadow" show in both operating systems !

any help would be appreciated ,

cheers Greg

In the "system" control panel, find the drive again and right-click on the only partition there, and there will be an option to add/remove drive letters to that disk. When the new window pops up, make sure there aren't two letters being assigned to it here.

Also, from a command prompt type "subst" and see if somehow the old DOS subsystem has aliased one drive to the other for some reason.

That is really wierd. I bet that Xp assigned one set of letter and Vista an other and now because bo OS's are seeing both sets of letters and getting confused. I would worry about haveing soem write problems if this goes on too long. have to tested the drives I/O times and are they consistent with what ud expect for type of drive?

Yeah if they are cross labeled that would make sense to correct that... Vista doesn't mind booting from other than C. XP will but it will "fuss" more... id say thry to chenge letters on vista to match what xp wants.

Dont format I'm just saying I wouldnt let it go on too long...