I am running XP Pro SP3. I have noticed that over the last couple of days that my cursor will momentarily freeze, or that audio will stutter for a second or that the keyboard will not make the characters I type in then all of a sudden display them all at once. I am not sure what is causing this. I even tried a fresh install of XP, and it began immediately. I notice also that CPU usage jumps up in the 70-80% range but it is so fast and brief that the process that is doing it will not come to the top of the list on the task manager, so I can't figure it out. Any thoughts are appreciated.