I am not sure why this is happening, but every time I leave skype on at night streaming video, it makes my computer run out of memory within 2 hours and shuts down my computer abruptly. I never had this happen before on other computers until this XPS 15 with Intel i7 and NVIDIA graphics card. I tried this on Linux and Windows, and get the same results. I am wondering why this could be happening only to this computer. Anyone have any ideas?