Ok , so this is my solution to the problem . First of all , the problem what that I was not able to boot my usb drive in order to install window 10 on my new M.2 Plextor M8Pe NVMe SSD . So , the first thnig to do is to be sure that you created a bootable usb using media creation tool made by microsoft . After this , reset CMS by pressing the little button on the side of your laptop ( in my case Lenovo Y520 , I have a little hole next to my audio jack ), and keep it pressed for like 10 secs . Be sure to set boot mode on UEFI and disable FAST BOOT and SECURE BOOT ( you can do all of this in BIOS) . As my pal said earlier , this work only if you have windows 10 installed on another HDD because you need one of it's function . So , the next thing to do is to open the windows , plug in the usb , and press SHIFT + RESTART to get in the SAFE MODE MENU . I posted a picture earlier that might help you . Choose " USE A DEVICE " and then choose to boot the USB DRIVE . This worked for me , but again THIS ONLY WORKS IF YOU ALREADY HAVE WINDOWS 10 INSTALLED ON ANOTHER DRIVE . If you have any questions , feel free to ask me ! Sorry if my explanation is not extra good , english is not my native language . Cheers !