1. make sure all your system uptodate
2. sudo apt-get install build-essential
3. using synaptic package manager search "nvidia-glx-new-dev-envy" and tag it and "nvidia-glx-new-envy"
4. Apply and reboot ...
note : make sure inside your hardware driver status disable for latest nvidia card before apply synaptic update
or easy way ...
1.make sure all system uptodate
2. using EnvyNG
3. Choose Nvidia 1.7.3 version
4. Apply ... and reboot
i try before for my lappy... all working properly ... except sound card T_T .. still in googling ..