Sometimes the wisest thing to do is
Reinstall Internet Explorer in Windows 7
Internet Explorer recently had some strange problems on my Windows 7 machine and instead of spending hours trying to figure out what was causing the problem, I decided to just reinstall the whole thing! Well, it solved my problem and that's why I'm writing about it.
Depending on your version of Windows 7, you may have IE 8, IE 9, IE 10, or IE 11 installed by default! Regardless of which version of IE is installed, you can uninstall and reinstall IE by simply going to the Control Panel. In the Control Panel, simply click on Programs and Features. If you don't see the list view like below, change the view to small or large icons.
Then click the Turn Windows features on or off link in the left pane.