The official how-to from Microsoft is "How to restore
the system/boot drive letter in Windows," at
http://support.microsoft.com/default...;EN-US;Q223188




"Juaco" <Juaco@discussions.microsoft.com> wrote in message
news:30FAFE6A-1013-4EF8-8783-BC8A1DEB87C4@microsoft.com...
> my error was to install an external hard drive with windows bootable
> inside,
> after reboot my unit c: was changed to H: what can i do for return it to
> C:
> letter?
>
> Thanks..