IE won't open blog pages

Yesterday morning, IE would not open pages. I have two WP blogs. Message was cannot display web page. First, one couldn’t be opened, now both can’t. Other computers in house could open. Now none in house open. I had to go through Google Search to click link and it opened. I put both sites on approved list in security and lowered security settings. No effect. I called Godaddy and they would access both blogs fine. I can access other sites. I have Windows 7 and IE 8. I have router with 2 laptops and one tower. Have done AV check of my laptop and is ok. I am going to download Google Chrome and try as will as Firefox. Any thoughts? Thanks. Bill