Internet Explorer 7 has a number of security options that you can customize, allowing you to get very specific on what sorts of actions you allow websites to take on your browser and computer.
If you've made several changes to IE7 security settings and then have problems browsing web sites, it can be difficult to determine what caused what.
Worse yet, some software installations and updates from Microsoft can make security changes without your permission.
Luckily it's very easy to take things back to default. Follow these steps to reset all Internet Explorer 7 security settings back to their default levels.
Open Internet Explorer 7.
From the Internet Explorer 7 command bar, choose Tools and then Internet Options.
In the Internet Options window, click on the Security tab.
Below the Security level for this zone area, and directly above the OK, Cancel, and Apply buttons, click the Reset all zones to default level button.
Click OK on the Internet Options window.
Close and then reopen Internet Explorer 7.
Try again to visit the web sites that were causing your problems to see if resetting the Internet Explorer 7 security settings on your computer helped.