My laptop has Win 7 Pro on it, and also Ubuntu Linux 16.04. Windows is a grumpy little OS that feels that it is the only OS in the universe. Ubuntu Linux realizes that it is not the only OS, just the most trouble-free and flexible-- But Ubuntu does not really care about the issues of other OS's. To get them both on the same laptop, I usually have to install Windows first, then nudge it aside with Ubuntu. If all goes well, the two systems mostly get along, but it is not elegant. On start up, there is a menu of OS's that allows you to select Ubuntu or Windows. If I choose Windows, I used to see a purple screen with white dashes for a while, then the Win boot menu would come up and all would be well. After the laptop crashed, I got the purple screen with white dashes, but the Win boot screen did not appear. I could hear the Win 7 start up tune, but could not see the screen. It turns out that the purple screen with white dashes is an Ubuntu splash scree...