A bootloader is a program that loads the OS kernel into RAM and is located in the MBR. In Windows OSes, there are two types of bootloaders:
- NTLDR is the old Windows bootloader that was used from Windows NT to Windows Server 2003.
- BOOTMGR is the newest Windows bootloader. It can be used from Windows Vista to Windows Server 2019.
Now, let's explore the boot sector, which contains the information that is needed to boot the server (that is, the bootloader).