\Boot\BCD Missing file In win8

Hello
I have purchased a notebook(ASUS) in which Win8 had already installed . So no key or backup or no cd/dvd was provided and i did'not make any recovery/backup.
But few day's ago the \Boot\BCD\ (code:0xc000000d) is missing so that windows is not opening and a blue screen with this issue open.
So, what could i do to save my geniune window, i have only concerned with that geniune issue, it's is not important to recover my data . how can i save my geniune window
So,please guide and give me proper method to solve this problem.

You have to at least have a recovery CD/USB to boot into command screen and attempt the repairs. Do you at have this?

Also, if it came with 8 installed there is possibly a recovery partition. Try tapping F9 very quickly at boot.

i haven't the Recovery
And i have only two drives C and D so, i think i don't have a recovery partition.
Am i understand correctly???

Did you try tapping F9 at boot? You have to do it very quickly, may take several tries. The recovery partition may be there, you don't see it unless using disk management in Control Panel.

You didn't answer if it came with 8 or it was an upgrade. If upgrade you are out of luck. What model is it? Did you buy new or used?

I tapped F9 it has open
Choose an Option
*Continue
*Trouble Shoot
*Turn Off Your PC

It comes in win8 but i upgrade it to win8.1

It is ASUS S550C yes i buy it new

If it came with 8 then that is what it will recover to, you'll lose everything. Did you select "Trouble Shoot"?

i pressed Continue it has opened my windows8 but it is some(little things are)(On previous times the windows logo come on opening a window but this time a different (ASUS Inspired ...) come ) different
So, I have noticed my key from computer properties.
Now can i take back up or it is still a missing file

I have my all data in drive "D"

zobid2 said:

i pressed Continue it has opened my windows8 but it is some(little things are)(On previous times the windows logo come on opening a window but this time a different (ASUS Inspired ...) come ) different
So, I have noticed my key from computer properties.
Now can i take back up or it is still a missing file

Click to expand...

Sorry, not sure what you are asking. The key you see in computer properties is not the real key, the real key is burned in the chip.
What are you asking is missing?

SO how can i get that key???
And can i take the back up / recovery??

What could i do now to restore my window and run as normally

Don't worry about the key for now, it is always there automatically.

Can you reboot normally or do you have to use the F9 procedure? If you have to use the F9 procedure then you need to do this:

Go to Charms Bar, select Settings, at bottom select Change PC settings, select Update and Recovery, select Recovery, then choose one of the top two choices.