I have had this problem for months. I also have a pop up stopper (changed versions and deleted it and reinstalled it) and nothing, still locking up, have clered cache, cookies, and history. Still nothing, even reinstalled IE. The only thing I can think of that I changed when I upgraded a new motherboard and CPU (never had this problem till then) is either a new IE update from MS or low ram. I have 256 DDR ram now, before had 516. Confusing!