There is no reset button and the F9 key does not bring up the reset screen, and there is no Boot Booster in the Bios menu ,
The factory reset key must be pressed and held down as soon as you turn the netbook on. If you press it too late it won't work. Some BIOS features such as the 'Boot Booster' apply only to certain models in the 901 range.
Keep in mind that you will lose any personal data when doing that.
So if there is anything you would like to save - personal files etc... - take steps to do that first; i.e. save personal files before proceeding to a factory reset...