It is with my problem definitely to the supervisor-BIOS-password. The user-BIOS-password I had already successfully deleted from the BIOS, but not thought of the supervisor password. When i restart, i was asked again for a password; so it must be such act to the supervisor password. The hard drive provides easy access is possible in the expanded state.
After entered three times trying get the message:
From DELL I got this password: fpjs7nnj, but which is probably not the right.
PS: Sorry for my english; i'm german