I don't know which part is wrong

[chanlovedor128102a6]

I bought a B550m mortal wifi and after i assemble my computer , i got in the bios and set my usb which have the windows 10 installation file in the first place , but when i exit the bios and the computer restart , it said that my pc needs to be repaired , what can i do?

 

[Blackburd]

It sounds like it is not finding a valid boot partition. What do you want to boot from? A USB stick? I often find this problem is due to an incorrect UEFI boot setting.