Hi @Cauptain, You should be able to enter the UEFI using the DEL-key, but you would need to restart Windows to be able to (Shutting the PC down and starting it again might not work due to fastboot). Alternatively you could also try to go to the start menu, press your shift-key, keep it pressed, and then choose restart, all the while keeping your shift-key pressed. This would boot Windows into recovery mode, and under Advanced options you should be able to find an option to change UEFI firmware settings, which would reboot the PC to the UEFI.
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