To do so you will need the recovery CD or sometimes the recovery is found on one partition of your system!
If you don't have the recovery partition use the recovery CD
boot it then follow the instructions!
go to mytoshiba.com.au. Go to the support link. pick your computer details from the drop down box. Go to FAQ. There are directions there to help you restore without the need for discs. you press the zero key and the power key, wait for beeps, take your finger off the power key and then follow the directions. It's easy Don't buy discs. Hope this is not too late for you
The technical error screen (blue screen) just keeps popping up.. Cant get into my computer... I updated my Bios from 1.60 to 1.80 found on the Toshiba support site ... Plz need fast help