I think <span>Dances with Wolves</span>
There are multiple things that effect the speed of your computer such as the processer, RAM, and what is on the computer itself. The first question would be to figure out what might be slowing down your computer and the reason for needing the increase in speed. This will tell you what part you need and the steps to take.
Answer:
more security
fewer bugs and faster fixes
no upgrade pushes
low coast
excellent support
as far as the risk part of it. I think that would be
the risk of license restriction, infringement.