Data execution prevention message: How do I turn it off?

For about 2 weeks now, every time I open up a new page (I use Internet Explorer and no I don't want to use Firefox or Google chrome) or I navigate to a new page, the page is closed and I get a data execution prevention message. I know that the websites I am going to are safe because they are all for school and I never had a problem before. How do I turn it off? I looked at the settings and it should only be turning on DEP for "essential windows programs only". I just want to turn it off completely.