Please try to clarify a bit. when you say it goes to BIOS screen what do you mean. Does it go directly to BIOS settings?
Can you try to boot it with a usb pen drive? You could try to but it up with a bootable windows pen drive and check if repair windows works. There's also other bootable tools to diagnose this problem, but you need to know what you are doing before using them.
If you have backups of the things you need, you can install everything from scratch,, with this windows bootable pen. If you don't have one, but have access to another PC, you can make one. Be sure to choose the windows version that is already installed in your laptop UX433, and download it. Choose the language pack that you want. You can choose the language pack by altering the link I send to the language you need. For example instead of en-us in the link, if you choose pt-pt it takes you to Portuguese language, if es-es it takes you to Spanish, etc...
https://www.microsoft.com/en-us/software-download/windows10 I've come across this webpage that points out some solutions also:
FIX: PC automatically goes to BIOS on startup