If you wish to do a complete factory recovery restore to fix common issues or malware/virus infections, then follow the instructions below.
Turn off your pc completely.
Now in this next step you must act fast, turn on your pc and as soon as you see the Toshiba logo press and hold both alt and 0(zero) keys alt+0.
You should then see the recovery console come up.
Select “Recovery of Factory Default Software” when you arrive at the Toshiba Recovery Wizard screen. Click “Next”. The “Recovery of Factory Default Software” window will appear on your screen.
If it doesn’t go to the Toshiba Recovery menu, then the Toshiba Recovery partition is most likely deleted or corrupted.