“NTLDR” is the boot loader file that plays a vital role in boosting the device. It used to load the system’s OS when MBR calls it to load the bootable file. After loading the kernel of OS, the device executes to launch automatically. It runs on all the editions of OS and performs the task of file boot loading. In case the system is unable to find the NTLDR file, then the display flashes boot error as the “NTLDR is Missing” issue.