So, its about the PC of me dad. Its a laptop (i3 2000 or 3000 series, NVidia graphics) and its like 5 years old. As it was slowing down I suggested that he should install Windows 10 as it was a gigantic upgrade in speed, boot time and stability on my 3 year old notebook. . When Win 10 was installed I tried to boot. It showed the boot screen and the little dotted wheel. Then it doesnt show a thing. Screen is on though. So went back to Win 7 and everything works again. But like really slow again. . Thanks in advance!