I am running windows XP Professional and am no longer able to use the ctrl alt del buttons to access the task manager. When I select these buttons I just get the bottom right hand corner of the dialogue box and am only able to cancel it by opening another instance of the same and going to thje Task Bar and right mouse-ing to close group. Has anyone any idea of how to correct this? I have tried reinstalling windows but as I have downloaded SP2 etc. I would need to reinstall of these.