i leave my computer running 24/7. every so often, maybe once a week, ill go to use it after it has been idling for a long time, and when i try to open any applications ill get an error telling me i dont have enough memory available to open the application. sometimes after leaving it idle something similar happens where i leave it to idle then when i get back on i try to open an application but nothing will happen. rebooting always corrects this problem. anyone have any ideas what may be causing this? thanks