Windows 10 black screen problem now unable to revert to previous build (Windows 7)

[smartmova]

Windows 10 was downloaded through update ok but took many hours to load into my pc. Unfortunately it now loads fully for a couple of minutes and then the screen goes black but I still have the curser which I can move around but there is nothing else showing on the screen. I managed after a few tries to enter settings and eventually troubleshooting and decided to abort and return to previous build (windows 7). My screen now shows "GO BACK TO THE PREVIOUS BUILD -we ran into a problem and won't be able to take you back to the previous build. Try resetting your current build instead"
Is there any way that I can resolve these problems without losing any of my personal data?

 

[bassfisher6522]

You can try using the "Recuva" software, it's free to see if you can save you personal data. You will need a working windows environment. You other choice would be to use a linux live CD, a distro of your choice. This will allow you to boot off the CD and access the HDD that windows is on and save your data that way.