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#1
Even though my main browser is Firefox. However, I never have any problem running IE or Chrome (I have Chrome installed so I can cast Videos to the big screen TV with Chromecast). All of them are running & opening almost instantly. You might want to look at the plugins/add-ons/spyware/malware that were installed without your knowledge. In addition, Windows Explorer and Internet Explorer sometimes work hand in hand so if you have installed some applications that have incompatible shell extensions/plugins installed might also cause the problem.
If the problem is consistent with the majority of people having it then I would blame the OS/IE but if the problem occurs with a few thousand out of hundred thousands then I would look at something that is not right with my installation.