I upgraded all of my window 7 computers to windows 10 last year. I have eight computers. No issues whatsoever. Even on my older computers that are over 10 years old there was not any issues but I did have to find a different video driver for one machine that windows could not find. Windows 10 is still free. If you do not like the new look of windows 10 there is a program to make it look just like windows 7.