SHELL

git@bitbucket.org: Permission denied (publickey).

just check your ssh by run

==>>  ssh-agent -l
if this not work to check the list  then use this

cd ~/.ssh
then ls to check all the list of ssh keys
=========

then add ssh key runt this (rsa is the name of the key that is added into your repo)

==>> ssh-add ~/.ssh/id_rsa

bitbucket permission denied (publickey). fatal: could not read from remote repository.

It looks like a permissions issue - not a Windows 7 issue.

Your ssh key is not authorised - Permission denied (publickey).

You need to create a public ssh key and ask the administrator of the Git repository to add the ssh public key

Information on how to do this: Saving ssh key fails