Hi I have Windows 8.1 H.P Pc 6GB with GeForce 2GB GT 630 DDR3 Graphics Accelerator Card. NVIDIA says for me to be ready for Shield need to upgrade to GTX 600 or higher series? Do I really need to or should I just ignore it? As it says I'm all ready for Windows 10. The G.card isn't even two years old. Also regards to older Windows 7 Pc says cpu not supported? Haven't a clue how to fix that or what other id need? Is a Packard Bell IMedia 5064 You'd think Microsoft would offer upgrade to Windows 8 for older models. Think its a ploy make ppl buy newer model. Wildlass32