Stuck on Preparing Automatic Repair (Windows 10)

So yesterday I spilled a glass of juice on my laptop's keyboard, damaging the following buttons: I / O / K / L / , / . / Arrow Left / Arrow Down / Arrow Right / 8 / Touchpad / Touchpad's Right and Left click

I tried to remove the buttons, dry and clean them, but the circuits were damaged.

Anyway, that's not the main problem, today I tried to turn my computer on, and it just gets stuck on "Preparing Automatic Repair". No matter how much time I wait, it never leaves this screen: http://i.imgur.com/9us5bEZ.jpg

If I try to press the power button to turn the pc off and on, it will get stuck on the Windows logo screen with the rotating loading circle, and it never leaves that screen: http://i.imgur.com/86FX2pT.jpg

If I press F2 when I turn the laptop on, it goes to BIOS, but I can't find anything there that will help me on this issue. There's no option to start the PC in safe mode or anything: http://i.imgur.com/QT057Od.jpg

What can I do? I have used this laptop for the last 4 years and I have very important files on it, from college, and also photos, and lots of stuff I made and downloaded in these years, I can't afford to lose them :(