what is the use of bootnxt file in windows 8 installation disc

while exploring the installation media of windows operating system i could see the following list of files :

Boot mgr - the boot sector loads the Windows Boot Manager (hidden system file BOOTMGR in the System Reserved Volume), which first looks for an active partition

hiberfil.sys Contains system state used when hibernating

pagefile.sys - Windows swapfile used for swapping system data between RAM and hard disk.

swapfile.sys - Swapfile.sys is a system controller file, normally around 256MB. It's used by Metro style applications.

But i cant find info related to bootnxt files

Whats the use of the bootnxt file what does it meant for?

Solution 1:

From verboon

When enabling the startup options, Windows updates the file BOOTNXT and creates a new file BOOTTGT.

When disabling the startup options, Windows again updates the file BOOTNXT and deletes the file BOOTTGT