brand new m.2 drive not booting after windows installed

my old intel m.2 128gb drive was getting full so i decided to buy a brand new 250gb samsung 960 evo m.2 and clean install windows 10 on it. the install went fine i deleted all old drives except for my 5tb hard drive that i used for everything on my pc but after it restarted for the first windows updates it never booted again. I tried changing it from uefi to legacy and made sure the drive was detected and number one on the boot list but still nothing worked. In uefi it goes past the asus screen and gives me gray screen that never changes and on legacy it goes past the windows screen and gives the same gray screen. Windows repair gives me the same grey screen. This is a custom built pc by a company that put it together perfectly. I have asus x99-e motherboard and all my parts support uefi and worked fine with it before. i have no clue how it's not working when my old one worked perfectly fine. any tips on getting windows installed and booted so i use my computer again