Joe
Does this happen after the computer has been on for a long period of time? Even though you close programs some of them have problems releasing the memory they were using and the only way to get it back is reboot. If you hit ctrl-alt-delete it will bring up a window showing what programs are running and how much memory they are using. You might want to run Ad-aware, Spybot or similar program to make sure some uninvited program is making use of your system. I guess your virtual memory setting could be messed up but unlikely if you haven’t been adjusting it.
Curt
