Internet Explorer 7, along with most browsers, work with other software programs that provide features in the browser like video viewing, photo editing, etc. These programs, called add-ons, are very small and work very closely with IE.
Sometimes add-ons can cause problems that prevent Internet Explorer from displaying web pages properly and may even prevent it from starting up correctly.
Since it's often difficult to tell which add-on is causing a problem, you need to disable each add-on, one by one, until the problem goes away. This is a very useful troubleshooting step when solving a wide variety of issues.
Open Internet Explorer 7.
Choose Tools from the menu.
From the resulting drop-down menu, choose Manage Add-ons, followed by Enable or Disable Add-ons....
In the Manage Add-ons window, choose Add-ons that have been used by Internet Explorer from the Show: drop-down box.
The resulting list will show every add-on that Internet Explorer 7 has ever used. If an add-on is causing the problem you're troubleshooting, it will be one of the add-ons listed here.
Select the first add-on listed, then select the Disabled radio button in the Settings area at the bottom of the window, and click OK.
Click OK if prompted with a "For changes to take effect, you might need to restart Internet Explorer" message.
Close and then reopen Internet Explorer 7.
Test whatever activities in Internet Explorer were causing the problem you're troubleshooting here.
If the problem is not resolved, repeat Steps 1 through 7, disabling one more add-on at a time until your problem is resolved.
If you've disabled all Internet Explorer 7 add-ons and your problem continues, you may need to Delete Internet Explorer 7 ActiveX Controls as an additional troubleshooting step.