Not able to copy private key from ubuntu to windows

Hi Team,

I was going through the link for chef basics “” where i came across the command “scp -i ~/.ssh/private_key ~/learn-chef/.chef/chefadmin.pem” i am running the same command from my ec2 ubuntu instance for windows 7 to copy the private file but first it says No such file or directory then Permission denied, please try again.Tried with id_rsa & but no luck,Can some one please guide me here?