I have a Dell that came with Windows 7 Pro. pre-installed. It came with 2 disks Windows 7 Pro. and Windows 10 Pro. I was going to install 10 on it but can't get a straight answer from dell. I tech says the disks have drivers on it but if they don't you can download them from the website and install them in any order and another Dell tech told me the disk don't have the drivers on it and have to be installed in a certain order. So now I'm confused. I know on the old dell machine the install order didn't matter. I have the drivers on a USB flash drive and they're listed (example: SP 68666). It's a Dell Inspiron15 5559 Laptop Any Ideas.