I am using a Dell XPS M1330 laptop, with 2.0GHz in processor speed and 4GB of RAM. Recently, in the past one week, I've noticed that my processor activity hits 100%. I've only had a about 3 windows open, and everything becomes very slow. My warranty with Dell is over, so I really need some help to find out what's going on. How can I check if all hardware is functioning correctly (ie RAM, PROCESSOR, HARD DISC etc). What can I check and how do I rectify this problem.