so i want to do a clean install of Windows 10 but I also want to keep all my application, files and what not. how would I do this? i saw some videos explain this but still not sure. do i make a back up of win 7 ( will it save all my apps and files) or do i make a image? and if i try to restore it will all the stuff be there? also if i try to restore it will it go back to the old os or not?