301.42 is Windows 7 only I believe. Have you gotten any crashes after installing it? With all the drivers I've tried I keep getting strange multi-color artifacts on screen and NVIDIA driver crashes. Most of the time the driver recovers. Only once I had to hard shut down my PC. The errors happen randomly.
No problems at all. no artifacts. Boot win8 up with "disable driver signing" install the 301.42 and reboot normally, all works just fine.