I've had Windows 10 for a while on my HP laptop. Yesterday, I got a gray screen and was unable to do anything without resetting the laptop to factory format. Now I have lost windows 10 and am back to Windows 7. Furthermore, my backup CD's won't reset/recover my former settings and all my documents as they were saved as windows 10 versions. Seeing as windows 10 is no longer available for free download, how do i recover all my files?