If you feel that Internet Explorer 8 is taking more time to load in Windows 7, you may follow this solution.
Open Internet Explorer 8.
Click Tools, select Manage Add-ons option.
Select All Add-ons and check the column “Loading time”
You may see the loading time for toolbars, add-ons, plugins and extensions installed in your PC. If you find any add-on/plug-in that takes more time (in minutes), you can consider disabling it. Use the Disable button to disable it directly.
If there is are any depended add-ons, IE8 will automatically search for them and gives a choice to disable them as well.
If you see any add-ons without the Load time, you may find the latest version or try disabling it to isolate if that is causing the slow down.