Problem after roon rock on nuc

**Core Machine

Intel nuc

Description Of Issue
Yesterday i install rock on my nuc.
Today i create a boot usb to replace rock with AN os.
I cannot boot from my usb device in any way.
Is it possible that the rock installaton mess up my boot loader?

Check/set boot order in BIOS or press F10 during NUC startup in order to see boot menu.
Rock has nothing to do with boot from USB.