Se você quiser apenas ocultar a unidade do Explorer, há um hack do registro descrito neste tópico do fórum:
link
Os passos são:
Start Menu >> Run and type regedit and press Enter Navigate to the
following path:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
(If Explorer is not here, you can right click and select new key and
enter Explorer to create key Explorer as image below.)
Right click New DWORD (32-bits) value:
Value Name: NoDrives
Value Data (Decimal): 65536
Restart your machine to apply changes and see your work.