Hi
Generally I agree with user Stevic but one point is not clear to me: if the HDD is faulty or damaged, then you will not be able to create a recover disk as mentioned by Stevic… so in such case you will need to order the recover disk. You can do this here:
http://backupmedia.toshiba.eu/landing.aspx
But I assume that your primary drive where the OS was installed is faulty.
So you will need to replace this…
In your case I would recommend contacting the Toshiba service provider in your country to get such drive… after the HDD replacement, you should install the OS using the recovery disk.