Solved! ASUS laptop boot problem


Aug 30, 2015
I have a ASUS laptop which ran on Windows 10.
Since a few days ago it does not boot anymore, when turning it on it goes straight to the BIOS setup. At the boot menu it gives me no options at all (not displaying any drives, harddrive or USB).
I downloaded a Windows 10 ISO file on a flashdrive but can't choose USB as a boot option. I did try turning off safe boot and fast boot and turned on CSM (as well as a combination of all). When I hold ESC when powering on with the flashdrive it goes to a black screen saying that there's no valid driver to boot from and that I must connect a source and press any button to retry.
What can be the problem? Thanks in advance.