..... is Data Execution Prevention? If I have more than one window open on the internet, when closing down one of the windows, I get an error message telling me that the internet page has closed. The a message in the bottom right hand corner of the screen re the Data......What is it and can I turn it off? I have followed the link to no avail and it is a recent occurance at a guess a couple of weeks or so. Running Vista and IE8