You don't mention how much memory you have. I presume that it used to display more than one internet explorer page at a time before and just doesn't do so now. Presuming you've had the PC for a while check to see what other programs are working and disable the ones you don't need as it may be them that are using all your memory. Alternatively if you don't actually have that much memory anyway it may be easier to buy another slab of memory. If you do decide to buy more memory then download Belarc to tell you what motherboard you have and then go to Crucial the memory company and buy from them as they guarantee their memory will work.