Windows 8 upgrade issues on Asus G53JW

[AdoringStan]

First of all, please don't turn this into a debate on whether Windows 8 is good or not, or try to tell me that Windows 8 isn't good. Everything is working well for the most part, except for a few problems I am having. I just tried Dishonored, and it's working great, but Minecraft won't work. My last problem is that whenever I try and change the brightness using FN+F5 / FN+F6, it will tell me on the screen that the brightness is going up and down, but it won't actually change it. That and a few of my other keys like that won't work. I tried going on to the Asus website to download the Asus Liveupdate program for windows 8, but whenever I tried to install it, it would tell me that I needed .NET firmwear, which Windows 8 comes with. Finally, I went to look at the needed updates for upgrading my specific model, but it mine was never in the list. Has anyone found a fix for this problem?