If your notebook begins to completely power off without any sort of error message or warning, then your system likely has a video driver issue or is overheating. If you have installed a video driver that you found on a site other than ours, then you need to uninstall the video driver, restart the laptop and then install the newest video driver on our site.
If the video driver doesn't solve the issue, then please, go to: www.cpuid.com and download the latest version of HWmonitor64, which will allow you to check the internal temperatures of your notebook. Make sure no hardware is going above 95C degrees.
If you see temperatures above this, that most likely means you need to clean out your vents. Please refer to the instructions in your user manual that shows how to remove the bottom cover of the laptop. Once removed, simply remove any dust build up that you see, and then reattach the bottom cover. Alternatively, you may purchase a can of compressed air, and spray all of the vents on the notebook, to clean out the dust.
If you are still having issues after following the instructions of this KB article, please contact us for further assistance, and be sure to specify that you have already tried the steps contained in this article.