So, this has been happening for pretty much every since I've bought the laptop.

The specs are Intel i7 Q 820 @ 173. GHz, 6gb of ram and nvidia geforce 260gtx.

What has been happening is this, whenever I am running java (e.g. Runescape), after some time (quite randomly to be honest) the drivers stop responding (and sometimes recover, but unless I close the java applet it just keeps on looping), give me a black screen splash or sometimes just freeze completely and I have to restart. I have tried using the latest video drivers provided by Dell on the support site and also tried manual downloads and updates from nvidia site. No matter which driver version I am using the problem persists. It sometimes happens with games as well but more often just  more often instantly freezing instead of 'stopping responding and then recovering'. I was just wondering whether anyone has any possible solutions to offer, I have tried calling Dell support but it says the number is not correct and when calling their different number they suggest calling that number, which I have tried before.