I am trying to recycle my old Toshiba Satellite A135-S4467( Window Vista) and try to wipe the whole disk clean so I don't worry about my personal data.
Many research on google suggests that Toshiba Satellite has hidden partition of hard drive which contains recovery files. It suggest me to continue press "0" when I first start up the computer; however, it only beeps uncontrollably and when I release the button, the window starts up normally.
Some suggest me to press "F8", it does get me to some place, where I can select type of start-up( repair laptop, safety mode, etc.), and when I click into repair laptop, it gives me some options to restore previous access point, recovery wizard,etc,. But the thing is the recovery wizard requires a boot disk which I don't have.
Further research shows that you can create a boot disk by using a pre-installed program called "Toshiba Recovery Disk Creator". But I searched the laptop in and out, and there is no this particular program.
At this point, I have no idea how to continue wipe my hard disk, more research on google seems to lead to the same solution, but does not apply to my particular case.