Laptop HP RT3290 windows 8.1 License
When you enable get this error message select boot image did not authenticate.
Googled all offer a solution. Enable legacy support and disable secure boot. I did it and when turning on get an error "no bootable device insert boot disk and press any key". Weird on the forums all this solution helped me in what could be the reason?
Attach the photo sections

The impression is that the problem with the disk problem if you have configured BIOS for some reason not changed......................I do not know. If it burns,try other resources,overclocking, etc. - mercedes commented on July 9th 19 at 11:31
e. Use the right arrow key to select Boot Options.
f. With Launch CSM highlighted, press Enter and use the down arrow to select Always. - mercedes commented on July 9th 19 at 11:37
e. Use the right arrow key to select Boot Options.
f. With Launch CSM highlighted, press Enter and use the down arrow to select Always. - Rod_Wolff21 commented on July 9th 19 at 11:43