I cannot quite pin-point when this problem started but my screen keeps blacking out for a few seconds at a time (randomly) and then recovers displaying the message that the display driver (nvlddmkm) stopped working and has recovered. This always causes Windows Media Player to crash (I often have a DVD playing on my monitor). I have followed advice such as updating drivers etc. but the Nvidia site says my drivers are as up to date as possible. I've also tried turning the Aero theme off and reducing the number of flashy Windows animations but to no avail. I have also found that recently, games which previously ran perfectly fine (e.g. Dragon Age) no longer work and crash within a minute of gameplay. Let me know what other details you need. Thanks!