It depends what you mean by a "disk copy". If you mean that you cloned the drive and have a complete drive image then yes it should work. How depends on what program you used to produce the cloned disk image.
Not sure what you mean by upgraded Win 7, Do you mean win 7 to win 8.1 or 10. Do you have registration codes for your version of Windows ie is it a genuine MS edition.
Is the computer a laptop or a desktop. If a laptop there is usually a hidden recovery partition which allows complete restore to factory condition. (provided you have not formatted the partition as well as the C: drive