According to Microsoft, some of the add-ons installed for both IE9 and IE8 can negatively impact the starting process of the browser, prolonging it more than normal. "When launching Internet Explorer, you may notice that Internet Explorer takes longer than expected to start," the company stated.
This issue can be caused if there're damaged or incompatibilities with installed IE add-ons. This behavior may be more visible in IE8 and IE9 due to changes in the way that IE8 and IE9 handle the internet zones list.
This issue can also be caused if using Spybot and the Spybot immunization feature is enabled.
To resolve, follow the steps listed below starting with Step 1: