To stop system freezes: Uninstall the drivers, after you do it, reboot and clean the leftovers with Atiman Uninstaller (download the latest version) use the automatic mode, after its done reboot again! Now reboot and install the drivers, 12.7...and reboot once more. After you do it, download and install the application profiles from 12.6 beta (June 12) install with custom installation, only the profiles! and reboot, after that uninstall your browser, uninstall flash player, in your browser and youtube disable hardware acceleration and clean the LOS, delete all sites and websites. Reboot once more and clean with Ccleaner, now you should be done!