Through a series of sales and friends' unwanted purchases, I now have a key for Windows 7 AND Windows 8.1. Before, I'd downgraded to 7 because of some video driver issues, but I bought a much better GPU and I have no problems now, ever. I heard that Microsoft is rolling Windows 9 out soon, and that in 2015 Win7 will no longer have any support. Should I pop in my 8.1 CD and upgrade, or should I stick with what I know and wait until the end of 7's days?