Right, a reset should offer to keep files. You will have to reinstall any 3rd-party apps that use them, though. I'm pretty sure your extra partitions (D: & E:) will be kept intact. Did you see my post where I asked to see the contents of those partitions? Enter those commands at a Command Prompt.
And you should find & test your BIOS Boot Menu F-Key which for an ASUS laptop is either Esc or F8. And the respective BIOS Setup keys are F9 or Del. That is going by the site I posted earlier.
Good luck, & keep us informed.