Yes, if you run too many things at once, you'll have problems. Poser demands a lot of resources. You need to take the time to defrag or speed disk your hard drive. Do that when nothing else is running. I do speed disk when I go to bed, or leave for work sometimes. I left my computer on all the time for awhile, then decided it just doesn't make sense. Now I mostly turn off my computer and my wife's when I'm gone. I need her computer on when I use Poser because Poser is just plain weird. Poser insists on looking at our network to see if my wife is running another copy of Poser. Heck, my wife doesn't use half the software I use!