OK its getting to a point now were im going to snap my monitor in half now. A few years ago I installed Windows XP , and ever since I did i have had a problem were it will randomly restart ( it is set to do this when it encounters a critical error so you dont see the blue screen ) but even if i turn the blue screen on i still have to restart because you cant just exit out of it.

The problem seems to occur when ever a new window opens, e.g. on msn, a new browser window

Has anyone got any ideas what it could be? thanks