I have a Dell xps l502x with Windows 10. I had restored my computer and saved some files on my backup in the other partition. I tried to find the other partition and changed my startup Hard drive through command prompt. The computer reboot and started in the Dell Diagnostics. Now it wont let me exit and go back to windows. I try to exit and it will restart right back to diagnostics. I tried F12 (it wont give me the option for F8) and it doesnt give me the option to reset. I am stuck and i dont know whT to do. Can someone help me get back to windows.