This has been reported a few times, but I could not find a usable solution to this nasty problem. Using Windows 7 X64, 4 gig ram. Autoit ver 3.3.4 Attached is a proof of concept. I embed an IE object in a tabbed Gui, and _IENavigate to the same website every 10 seconds (Wall St Journal home page). Initial memory usage is about 100 meg, already high but I could live with it. Every reload causes additional memory to be consumed and after a very short time 500 meg is used. I le