I had nothing but trouble with Windows 10 when I downloaded it on my Dell machine with Windows 7 even though they said it would work. Things were blurry and icons had shadows. When I fixed that some of my programs didn't work. Couldn't open important files. Nothing but trouble and when that wasn't bad enough the machine froze. I decided to go back to Windows 7, an option that was given to me but when I did that I had mountains of trouble. Ended up rebooting and losing everything and started all over again but with Windows 7. Glad I had a backup disk to work with. So my advice is don't do it on an old machine.