" purchased"
I do hope you didn’t spend much for it. Do you have any other bootable CDs that you could test booting with?
Is your machine relatively new? ie Is it a UEFI machine? If so to boot a non-UEFI device you also have to change the BIOS from UEFI mode to Legacy mode to boot the CD.
Should you wish to try a different Linux system, you can download a free app named Easy2Boot and any number of free Linux ISOs, I personally prefer one named Porteus, and create a new CD or USB drive and boot it to access your files. While GParted is a good system you don’t need to repartition your USB drive to access the hidden files. You simply need a system that supports reading all partitions on a removable drive and all Linux systems can do that. Once you can read them you can copy your files to your machine’s C: drive.
See there’s still hope. 
