no bootable devices found

Hi,

I am facing an issue at laptop booting it gives “no bootable devices found”.

It started uut of the sudden it gave me the dell assistant screen which required bitlocker key that I did not have and I don’t think that I have enable encryption on my laptop, after a lots of search I was able to get the key inside my company active directory.

Now i have the key I don’t have the assistance screen anymore, it just gave me sometimes no boot available and other times no boot device found.   

I tried couple of solutions I found on the community, resetting BIOS worked for me and I was able to lunch the windows after entering bitlocker recovery key, but strangely at each reboot I got the same error not bootable devises found and each time I need to rest the BIOS again.

Now I always get the same message: no bootable devices found, also I have disabled disk encryption for now.

Appreciate your assistant.

Thanks