.... Welcome to G
o,, Look around and enjoy the forums. If you need any help just post in the appropriate forum and we will be glad to help. We are all volunteers so please understand we are not always here and it may take some time to respond to your post.
A couple things to consider.
Did your friend reformat the entire drive? thereby wiping everything off the drive.
Did he/she install a 2nd operating system and keep the original?
So basicly....Is there 2 copies of the OS (operating system)?
A data recovery service will be very expensive.
Recuva will most likely work, but it will depend on the size of the hard drive. You will also need another drive to put the recovered data on. It has to be able to hold all that it finds.