Hi ,
I feel your pain. I had the same problem. The only thing I have been able to do is tap repeatedly in the F2 key as soon as I turn on the power button. This takes me to the utilities window. So I know there is a way to bypass the boot sequence which became corrupted but I have nit gone further from this point. I know and now believe that I will need to uninstall AVG antivirus which I have been using for sometime.. windows defender does not like third party software.
I'm sorry I can't guide you through the utilities menu because I havent done so myself yet. I want to have a plan to restore in place before I bypass the current boot set up, which is stuck and corrupted. Any knowledgable geek can navigate the utilities and hopefully help bypass current currupt settings. So i think there is hope.
Regards,
Tony