Issues with UEFI: Can't save settings and can't boot OS automatically

Question

Product: HP r245tx (mohterboard system board ID 2337)

Specs: Insyde UEFI F.36, 250GB SSD, 8GB RAM, running Windows 10 x64

I've installed Windows 10 x64 on my laptop. Here are the issues which I'm facing:

The boot-up is long, however restarting is way fast
UEFI doesn't boot directly Windows, it keeps saying no bootable device found;  I'm booting my laptop manually by using the boot device selection, and then opening the appropriate EFI file, here bootx64.efi
UEFI settings aren't getting saved, and even though I select "Exit with saving changes", the settings aren't sustained on the next boot up.
HP splash screen doesn't appear at boot up.

On seeing these issues, I thought something was wrong with the UEFI firmware, so I downloaded the latest official UEFI driver (F.46, Rev A), but it couldn't update the UEFI firmware; upon further inspection, I found the driver didn't contain a UEFI firmware image for my motherboard and I have been unable to find that anywhere.
Are there any other ways to go about solving this problem?
Update
I forgot to mention that even though I have 8 GB RAM on my PC, the system information shows it to be 4 GB sometimes.
Update 2:
I have opened up my laptop. The motherboard number is ASO56 - LA - B972P.
Please help me with how to trace back the BIOS that should be compatible with this board. I suspect that during a past repair at the HP service centre, they probably mixed up things a bit.
Solved *******************************
Th problem wasn't with the BIOS. It was due to bug in the Kubuntu Linux kernel that I was trying to install. Fixed it following instructions in this link.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147%C2%A0

Devank Mishra · Answer

The problem wasn't with the BIOS. It was due to bug in the Kubuntu Linux kernel that I was trying to install. Fixed it following instructions in this link.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147%C2%A0

Keltari · Answer

The symptoms point the internal CMOS battery being dead.  The CMOS battery saves the desktop's/laptop's BIOS settings when the computer is not being powered by either the power adapter or the laptop battery.  When this battery is no longer able to keep those settings active, the settings are lost and need to be reset each boot.  Sometimes this results in the device trying to boot a drive other than the one the operating systems is on.  Additionally, the clock in the computer is off, but this can be often missed, as most operating systems check the internet and automatically set the proper time.  What is odd, is that it is common for the computer to post a warning at boot that the battery is not working.  It is possible that you missed the warning or it isnt being shown for some reason.
I would open up the laptop and check the CMOS battery with a multimeter, and/or replace it.  They are very cheap.  If this turns out not to be the issue, then I would seek further help.

Issues with UEFI: Can't save settings and can't boot OS automatically

Update

Update 2:

Solved *******************************

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