I've been monitoring PF usage as reflected in task manager performance section. Its starts out at about 140 MB, but slowly continuously creeps up and up until it is so large I get a low vitrual memory warning, & the system freezes. It makes no difference whether or not i have any applications open or whether any have been opened at all. I don't see anything in the processes section of task manager that could be using memory other that what seem windors system files.