1. Open Tools > Internet Options, click the 'Advanced' tab, and uncheck the
'Enable third-party browser extensions.' Click 'OK', and then close and re-open
Internet Explorer. This disables all 3rd party browser extensions from loading
inside IE, and may resolve the issue
2. Open Tools > Manage Add-ons (IE6) or Tools > Manage Add-ons > Enable or
Disable Add-ons (IE7) to provide you with a window where you can selectively
enable or disable loaded controls inside IE (via the 'Enable' and 'Disable' buttons
in the bottom of the window) to narrow down which could be causing the issue
3. Run msconfig to disable all non-critical non-Microsoft startup items and
non-Microsoft services (reboot required) to see if a startup item or service could
be causing the issue as well