Win 7 Administrator account accidently deleted... how do I recover ac?

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How did this happen?

Are there no other accounts?

You cant delete the Admin Account if its the only one, and a standard user cannot delete an admin account, therefore there must still be one account that is admin on the pc.

 
There is no way to do that unless you were seriously messing with files under the C:\Windows directory, in which case you can expect weird things to happen. Can be fixed by repairing or reinstalling your OS.
 
I know a way to enable/show admin account and to hide/disable it. This the first time i heard/know it can be deleted....

Could u give a detail about it...
and any effect it having (after it deleted)...

btw: I hope this not asking a way to breach admin pass/security thread.... we cannot help u in that
 
Sounds kinda sketchy to me, I think Windows requires there to be at least one administrator account, I think what he is trying to do is recover one that he has access to, which can be used to access a computer that is not yours.