how can i solve the missing winload.efi file in windows 8?

when i start my pc which is having windows 8 OS. Iam getting the error like this 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: 0xc0000225 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

pls try to provide solution to get rid of this problem