Hi there,
I've been experiencing issues with my Alienware computer (along with other various things) and have decided to Factory Reset my M14x R2 that runs on Windows 8.1.
I have been trying to do this by using the 'Update and Recovery' section. However, when I use either the 'Refresh your PC without affecting your files' or the 'Remove everything and reinstall Windows,' it then fails to do so and proceeds to tell me that;

Your PC needs to be repaired
The application or operating system couldn't be located because a required file is missing or contains errors.

File: \windows\system32\winload.efi
Error Code: 0xc0000001

You'll need to use the recovery tools on your installation media. If you don't have any installation media (like a disc or USB device) contact your system administrator or PC manufacturer. 

I've also tried a Factory Reset via the Alien Respawn center, but I have received the same message. 

What should I do? 
Can you help me please. 
Thank-you.
-Ellie.