This activity monitor sure is an interesting thing, which I was not aware of before ... Seems that in my case the process "WindowServer" takes usually the most % ... What exactly is that ??? The finder ? The visual drawing tool in general ?? Thanks P on 11/24/03 12:52 AM, Jack Rodgers at jackrodgers at earthlink.net wrote: > Resetting the cache and manually deleting my history files seems to > have cleared up the problem. Perhaps copying the user preferences and > other items after my Panther upgrade and then moving the files from my > 15" tiBook to the 17" alBook created the problem. > > So, if your fan begins running constantly, open the Activity Monitor in > Panther and see if one of your applications is revving the cpu and then > see if you can find out why. > >