HELP! Failed to system recovery ! Winload Missing !

There are error when i tried to recovery to factory setting on my m17x-r4 , i have upgraded it to window8.1

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Your PC needs to be repaired

The application or operating system couldn't be loaded 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

Press Enter to try again

Press F8 for Startup Settings

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i do not have the recovery CD and usb ,,what should i do????