There are some data recovery programs that could do the job. You could search for them over the Internet.
If they don't help you, then you could try to access the data using Linux Live USB / CD. Within the Ubuntu forum you can see the steps how to make a bootable flash. Once you have downloaded the .iso file, change the boot priority on the computer where the USB is placed. It is done through the BIOS and you must change the boot priority to be from USB ports and not the HDD. When it boots from the PC, you have to click on try and and not on install the OS.