stuck bios unable to start hell

SAVVAGE61 wrote: z270   bios p2.10  windows 10 pro 64 bit   Samsung 960 EVO m.2  pcie  was booting to  m.2 just fine I did something stupid just not sure what   MS is default boot 1st in order everytime I start my machine I get the bios warning system has tried to boot and failed sevral time  system guard message tells me to to go to set up or boot manager counts down goes to boot manager shows my ssd and my hdd storage I click on ssd in boot manger(on screen) or menu boots right up  restart and go thru the same thing everytime. it like it doesnt reconize my m.2 pcie until I select it even though it is default boot. does anyone know what I did and how to fix it? I am so stressedafter4 hrs of this Asrock z270 tiachi I7 7700K

Did you try clearing the UEFI/BIOS?

If you installed Windows 10 correctly for an NVMe SSD (960 EVO), the entry in the boot order should be, "Windows Boot Manager: Samsung 960 EVO". Other entries for the 960 EVO, if present, are not the right ones.

Did you install Windows with any other drives powered up during the installation? If you did, the System/Boot partition was written to another drive, a known behavior of the Windows installer. That makes booting Windows dependent on the other drive. If the other drive had something done to it, it could affect booting.

Did you configure anything in the UEFI when you installed Windows on the 960 EVO? Specifically, the CSM option, or its sub-option, Launch Storage OpROM Policy? You told me you changed to a new UEFI version, did you check your settings after doing that? They were all set to their defaults after the update.