F9 factory reset not working on ASUS notebook

model is a E402M but when i boot up the laptop and try to access the troubleshoot menu with F9 nothing happens. pressing F2 brings me to a blue screen with BIOS information and boot configuration etc. but i have no idea how to factory reset.
ive tried youtube but all the ASUS windows 8 factory reset tutorials show the F9 way of factory reseting. this laptop is running 8.1 if that helps.

Welcome to the forum if you open disk manager is there s partition called recovery or similar it could just have lost the MBR for the key

Look at the Users Manual: https://www.asus.com/Notebooks/E402MA/HelpDesk_Manual/

starting on page 77 for recovery options and how to access them.