On a working computer, create a Windows Installation media that will allow you to repair existing Windows Installation.
Create a USB Flash Drive
https://www.tenforums.com/tutorials/2376-create...
Boot from the USB Flash drive-Make sure you have disabled Secure boot/Fast boot in BIOS Settings.
https://www.tenforums.com/tutorials/21756-boot-...
https://www.tenforums.com/tutorials/21284-enabl...
Then open Advanced Startup options after the computer boots from USB. Click Repair your computer at the first screen that says Install now.
https://www.tenforums.com/tutorials/2294-boot-a...
Select Startup repair, let it finish the job and see if the computer can boot afterward.
Create a USB Flash Drive
https://www.tenforums.com/tutorials/2376-create...
Boot from the USB Flash drive-Make sure you have disabled Secure boot/Fast boot in BIOS Settings.
https://www.tenforums.com/tutorials/21756-boot-...
https://www.tenforums.com/tutorials/21284-enabl...
Then open Advanced Startup options after the computer boots from USB. Click Repair your computer at the first screen that says Install now.
https://www.tenforums.com/tutorials/2294-boot-a...
Select Startup repair, let it finish the job and see if the computer can boot afterward.