Wireless card/Display Driver Randomly stops working

I have recently been having problems with my Dell Xps M1530. Over time, when running, the wireless card will stop working. When this happens, it starts out normal, then the computer will freeze for a few seconds, music playing will begin to loop, and eventually the screen goes black, then comes back on, USUALLY, or sometimes not at all, a pop up tells me that the Nvidia driver has stopped working and has recovered. However, my wireless card randomly stops working after this occurrence. I know this for a fact because the blue light saying "WIFI" turns off and I no longer have a connection to the internet, even though the wireless switch on the side is on. This occurrence usually happens anywhere between 30 minutes to 3 hours, but it has never gone longer than about 3 hours until this happens. I have no idea why a display driver would have anything to do with the wireless card, but it is all linked. Also, kind of a related question, a similar event occurs. It will begin the same way, normal, then will freeze up and then go black, finally returning to the screen. The difference this time is that the screen resolution changes to 1024 x 768 and I cannot change it back to 1280x800. In this separate occurrence, the wireless card stays running, but the display driver stops working, and doesn't fully recover. These two events have been irritating me recently as every time, the only way to stop the problems is to restart the computer. The temperature I know is not a problem either as I have a cooling pad with two fans running underneath the laptop. Does anyone have any ideas as to why this happens?