last week, after installing a divx codec, my computer,running windows XP pro, started slowing down immenseley every 5-10 minutes. I believe it has something to do with memory, because using task manager, it usually shows only a normal level of activity with the cpu. By slowing down immensely, i mean so slow it takes 30 seconds for the start menu to pop up. I am running a computer with 240 mb ram, 20 gb hard drive, and duron 850. Any help would be greatly appreciated.