I have just recently bought myself a HP ENVY DV6 laptop, and a wireless Xbox360 controller. The controller is made by Microsoft so it isn't a cheap 3rd party ripoff. I went to play Oblivion and about 1/2 of the buttons weren't working, including the z-axis. I went to the game controller settings and the buttons all seemed to work fine, but the z-axis was still not working. The laptop is installed with windows 8 (it came with the laptop so there wasn't ever win 7 to start with), and I've heard that heaps of other people are experiencing the same problems with Win 8.