Asus X751LAV BIOS settings loop

It has the indications of either
1. A failing drive - hard drive on which windows is installed
2. Faulty ram
3. If you are unlucky a fault on the system board or other hardware

I suggest you start with a drive check
Boot the laptop from a windows 10 installation usb made from here
https://www.microsoft.com/en-gb/software-download/windows10

obviously you will have to make it on another computer

That presumes you can either use one time boot options on post or change boot in BIOS to usb

When you have it booted from there -
repair your computer
troubleshoot
advanced options
command prompt

When you get to the prompt
establish the driver letter that has windows directory in it
IT IS NOT always lettered C drive at the cmd prompt from the installation media
You will note that the cmd prompt window is at an X prompt

When you have established the drive letter
run the cmd
chkdsk C: /r
That is of course
If you have established that the drive letter is C

see here for how to check
https://support.microsoft.com/en-gb...ry-environment-winre-to-troubleshoot-common-s

At the command prompt type
C:
and press enter
if the prompt now changes to
C:\>
at this prompt type
dir
and press enter

does the list contain the entry
windows

Well as I said, the letter in the recovery cmd prompt for drives is not always the same as it is in windows
When you get home try
D:

I do not really know what procedure you adopted after the system restore when you say you did a factory reset
Or what make your laptop is and what OS it originally came with when new
However taking a Dell as an example and it is the SAME for all laptops with factory reset, albeit the procedure for invoking the factory reset may be different

If your laptop came with Windows 7 for instance and you then upgraded that to 10, then a factory reset is going to take you back to 7 and ALL data on the drive is going to be deleted

A factory reset can take quite sometime, up to an hour and the laptop will restart a number of times

This MAYBE what has occurred and if you interrupted the process believing that it had failed you could end up with the situation you now have

See this for an explanation. This is for a Dell so it is only an example
https://www.dell.com/support/articl...tall-windows-10-on-your-dell-computer?lang=en
See under the heading
Reinstall Windows 10 to the Dell factory image using the Windows Recovery Environment (WinRE)

YOU MAY consider it easier, although of course all your data will be lost to make a clean install of 10 from the USB pen
Boot the computer from that and follow the procedure here
IT IS IMPORTANT to delete ALL partitions on the drive and the install will automatically create the necessary partitions
https://www.tenforums.com/tutorials/1950-clean-install-windows-10-a.html

YOU will not need a product key
Windows 10 will have been registered on the Microsoft activation servers and will activate online

NOTE If you wish to continue to try to recover without proceeding to the clean install then as a first step go back to the repair your computer, troubleshoot advanced options
and this time try
startup repair

If it fails to repair on the screen that shows that message click advanced options and run it three times
as here
Run Startup Repair again:
Click/tap on Advanced options, and go to step 2 above. Sometimes it may take running Startup Repair up to 3 times and restarting the PC each time to fix the startup issue.

I DO NOT EXPECT THAT to succeed but you may wish to try all options before proceeding to a clean install