This is a real nuisance. Whenever I get a pop-up window appearing whilst online clicking the 'x' to close it has the effect of closing down Internet Explorer. The pop-up windows can be of any sort - the annoying advert types or genuine ones that appear when doing an online purchase, for example. The result is always the same. has anyone got any info on what is causing this and how to stop it happening. All I want to do is close the pop-up yet remain online - not too much to ask for really.