I loaded Windows 10 and didn't like it (I couldn't view my videos, choppy, things took longer, couldn't find things like control panel, etc) so I found where you can go back to Windows 7.......guess what............I now have a computer that doesn't work at all............nothing works. It completely deleted my Windows 7.......message states........Windows Installer not installed..............WHAT THE HECK HAPPENED TO MY WINDOWS 7? Can I get my stuff back............I did a restore............nothing happened............I tried to use my back up tapes...........my DVD player doesn't work................NOTHING WORKS NOW BECAUSE OF WINDOWS 10. Who is going to buy me another computer..............I bet Windows 10 won't..........as you can tell I'm mad.