D drive data replaced by old C drive content

Hello,

Last nite, i formatted my C drive.
When it prompt to type the serial number, which I forgot..then i shut it down.
The serial is in my D drive.
So, i try to install new OS that does not required serial no.
But then, i saw my D drive content was my last C drive content before i format it.

How can i recover my data in D drive? Coz i only format my C drive.
Can it be done?

Please help, thanks in advance