Have you accedently got a drive letter wrong by not activating Data disk or just want to change your drive letter?
This is how you do it with Diskpart.
Open command line:
cmd
Type Diskpart
C:\Users\Johan>diskpart Microsoft DiskPart version 6.1.7601 Copyright (C) 1999-2008 Microsoft Corporation. Dator: STATIONT DISKPART>
List current volumes:
DISKPART> list volume Volumenr 0 E DVD-ROM 0 B Volumenr 1 G DVD-ROM 0 B Volumenr 2 F DVD-ROM 0 B Volumenr 3 C WINDOWS NTFS Partition 299 G Volymnr 4 D Data NTFS Partition 296 G Volymnr 5 SYSTEM NTFS Partition 400 M DISKPART>
Select Volume:
DISKPART> select volume 2 Volume 2 is the selected volume. DISKPART>
Remove the drive letter:
DISKPART> remove letter "F" The drive letter or mount point is removed. DISKPART>
Assigne the new drive letter:
DISKPART> assign letter "Q" The drive letter or mount point is removed. DISKPART>
That was all folks
A command recap:
Diskpart list volume select volume 1 ,2,3,4,5 what ever your DCROM Drive or HD ist… remove letter=E “for exmple” assign letter=D “for exmple”