I gave you that option in my post just above.
First I would try booting it to Repair as given.
Then you can either buy PW Pro version to write to flash stick to see if it can complete conversion (questionable) or try writing it's free ISO provided earlier to stick using Win2Flash.
Or you can clean reinstall following the steps in the tutorial to get a perfect clean reinstall.
If your data is still intact it can be copied out using Copy & Paste - in Windows Recovery Console
. If it is still intact it also might mean Windows 7 is still reparable and/or convertible.