Windows 7 Remote Hack Manage

I am trying to access windows 7 64bit form my win 7 64bit machine..both are in work group..

i am trying to access as below process

when i use net use \\computername\IPC$ /user pass

success

and then i opened computer management and connect to remote computer i can see and browse users and computers and users.when i enable Administrator account it says access denied.. if i open services it says access denied..

i am using a account to connect to remote computer is part of administrators group in remote pc

remote Management is enabled and remote registry is disabled in remote pc..

I there any way to start and stop remote services with IPC$ share access,i used sc command and it says access denied,i cant not access ADMIN$ as well

i can not found any exploit for windows 7.

please hep