Internet Explorer Security

The full guide can be viewed at Microsoft's site to install / uninstall Internet Explorer 9 (eg use IE8):

http://windows.microsoft.com/en-US/windows7/how-do-i-install-or-uninstall-internet-explorer-9

I've pasted the relevant portion for your convenience:

To uninstall Internet Explorer

The following instructions apply to both Windows 7 and Windows Vista.

1. Click the Start button , type Programs and Features in the search box, and then click View installed updates in the left pane.
   

2. Under Uninstall an update, scroll down to the Microsoft Windows section.
   

3. Right-click Windows Internet Explorer 9, click Uninstall, and then, when prompted, click Yes.
   

4. Click one of the following:
   

   • Restart now (to finish the process of uninstalling Internet Explorer 9, and restore the previous version of Internet Explorer).
     

   • Restart later (to wait until you shut down or restart your computer).
     

After you uninstall Internet Explorer 9, the previously installed version ofInternet Explorer will be available on your computer. It is not necessary to reinstall.

Please leave feedback if this was helpful. Thanks!

1. Restart your computer unless you've already done so. The ieframe.dll error might be a fluke and a simple restart could clear it up completely.
   
   
2. Install the latest version of Internet Explorer. No matter if you're missing ieframe.dll or if you're receiving a browser error message about it, reinstalling or updating to the latest version of Internet Explorer has resolved many user's issues with ieframe.dll.
   
   
3. Using Visual Basic 6? If so, change the reference for Microsoft Internet Controls from the existing ieframe.dll to shdocvw.ocx. Save your project and then reopen it.
   
   
4. Restart your router, switch, cable/DSL modem and anything else that's used to communicate to the Internet or other computers on your network. There may be an issue in one of these pieces of hardware that a simple restart could solve.
   
   
5. Scan your entire computer for viruses. Sometimes, the ieframe.dll error will show up when your computer is infected with certain kinds of viruses. Use your antivirus software to do a complete system scan for virus infections.
   
   
6. Disable Windows Firewall in Windows XP if you have another firewall installed. Running two firewall applications at the same time can cause problems so if you have a firewall program installed like ZoneAlarm, Norton Personal Firewall, Comodo Firewall, etc., then you should not be running Windows's built-in firewall simultaneously.
   
   Note: Even if you're positive that the Windows firewall is disabled, check again. Some Microsoft security updates have been known to re-enable the firewall automatically even if you have an existing firewall enabled in another security software program.
   
   
7. Update all non-Microsoft firewall and other security software on your computer. Certain security updates from Microsoft have been known to cause issues with security software from other vendors that those vendors are responsible for resolving. Check their websites for updates or service packs and install any that are available.
   
   Note: If you're already running a fully updated version of your security software, try uninstalling and then reinstalling the software instead. A clean installation may stop that nagging ieframe.dll error message.
   
   
8. Install any available Windows updates. It is true that some previous updates from Microsoft may actually cause some ieframe.dll errors, but installing more recent updates, especially those to the Windows Update software itself, may help resolve the problem.
   
   
9. Clear the temporary Internet files in Internet Explorer 7. Some ieframe.dll issues may have to do with problems accessing existing temporary Internet files.
   
   
10. Increase the frequency that Internet Explorer 7 checks for new versions of web pages. If the default setting is too infrequent and there are issues with certain pages, you may see ieframe.dll and related errors.
    
    
11. Disable Internet Explorer 7 add-ons one by one. One of your installed add-ons might be causing the ieframe.dll issue. Selectively disabling them will show you which one, if any, is causing problems.
    
    
12. Set Internet Explorer 7 security options back to their default levels. Some programs, even some updates from Microsoft, will sometimes make automatic changes to your Internet Explorer 7 security settings.
    
    Incorrect or overprotective security settings can sometimes cause ieframe.dll issues. Returning these settings to their default levels may correct your issue.
    
    
13. Move the IE7 Temporary Internet Files Folder to its Default Location in Windows XP. If the Temporary Internet Files folder in Internet Explorer 7 has been moved from its original location, plus both Protected Mode and the Phishing Filter are enabled, the ieframe.dll error will occur.
    
    
14. Disable the Phishing Filter in Internet Explorer 7. This isn't a great long term solution if you don't have another phishing filter installed, but disabling IE7's phishing filter has been known to correct ieframe.dll issues in some situations.
    
    
15. Disable Protected Mode in Internet Explorer 7. The Protected Mode feature in Internet Explorer 7 can, in some very specific situations, be involved in generating an ieframe.dll error message.