Internet Explorer 11 and Windows 7 Question

I have had Windows 7 and Internet Explorer 11 as the browser for some time now. I've never had any problems with any of my websites loading properly, until recently. It seems like almost every time I try to load a website, IE 11 comes up with an error message and says it needs to close. What's funny is if I persist with clicking the IE error boxes, it finally lets me view the website. I have Mcafee for a virus detector, and it scanned with no viruses detected.

Does anyone have a possible clue as to what might be happening? If so, I would appreciate any help!

Thanks,

JS