I don't have a c.d. in or photos up or anything like that...just a few webpages open is all and one word document minimized. It's sitting on my bed, true, but on the flat sheet and it never used to do this in the same situation. Also, if I leave it open and come back an hour or two later, it's still hot, though slightly cooler (but only slightly). If there's a pop-up I don't see it. But isn't it possible to get "pop-ups" that aren't really seen (like a bug or whatever; something that bogs down the system)? Any thoughts? What are the typical reasons besides a heavy duty program running (or whatever the correct terminology would be) or not getting enough space underneath to "breathe?" Thank you!