http://aps2.toshiba-tro.de/kb0/HTD7C02140000R01.ht m

V návodu je to ale popsáno:
Be sure to connect the AC adaptor, otherwise you may run out of battery
during the recovery process.
When you reinstall the Windows operating system, the hard disk will be
reformatted and all data will be lost.
1. Turn off the computer.
2. Turn on the computer and when the TOSHIBA screen appears
repeatedly press the F8 key.
3. The Advanced Boot Options menu will be displayed.
Use the arrow keys to select Repair Your Computer and press
ENTER.
4. Select your preferred keyboard layout and press Next.
5. To access the recovery process please log on as an enabled user with
sufficent rights.
6. Click TOSHIBA HDD Recovery on the System Recovery Options
screen.
7. Follow the on-screen instructions on the TOSHIBA HDD Recovery
dialog.
The computer will be restored to its factory state.