I tried to install elementaryOS on my new HP notebook that I've recently bought for school. The PC has UEFI instead of BIOS, I've followed an online guide for installing elementary OS ( e.g. disable secure-boot,fast boot and legacy boot). If I try to run the OS in live mode it works fine, but if I install it I got a grub problem. In fact (by clicking on key F9) if I set as first device the grub I got a black screen where I should manually load the linux kernel. I've done this (by following an other guide) but, after lonux kernel loading, I got the budybox screen but nothing changes. After the reboot I got the same problem.
I've also tried to install the boot-repair tool which gave me the following message: link. After reboot the problem is still there.
Also, I can set as first boot device windows boot manager and can easly use Windows 10 on the other partition of the same HDD.
Hope anyone could help me. Thanks!