Not unless you have a fan monitoring program, or a temperature monitoring program.
Could it be your CD/DVD drive? I know that mine will try to read what's in the drive at startup...but only at startup.
Next time this happens, hit Ctrl+Alt+Delete, click task manager (might bring you right to in in XP home edition) and look at the process's and see what's sucking up all your resources. Post back and let us know what you find.
Also, what kind of computer do you have (model), and is it a lap top or a desk top?
Let us know!
War produces veterans, wounded both physically and mentally. They have sacrificed for us.....and it is now our job to help these veterans, as they have already helped us in ways we will never know, in ways that we cannot fathom, and in ways that we take granted every day.