Chances are shdocvw.dll got corrupted, here's how to fix it
1.Shut down the computer.
2.After the computer has been shut down, turn on the computer and begin pressing the F8 key in one-second intervals. If you complete this step successfully, the Microsoft Windows Startup Menu is displayed. If no menu is displayed and Windows starts up normally, repeat this step.
3.At the Microsoft Windows Startup Menu, use the ARROW keys to select Command prompt only, and then press the ENTER key.
4.At the command prompt, type: cd windows\system. Press ENTER.
5.At the C:\windows\system prompt, type: copy shdocvw.bak shdocvw.dll. Press ENTER. If entered successfully, the screen should display 1 file copied.
6.Press CTRL_ALT+DELETE to restart the computer.
That should hopefully fix it, if not you may have to restore IE.
Here's an MS link on how to do that. I'd try just repairing the shdocvw.dll method first though.