They also have "InPrivate" browsing which helps prevent Internet Explorer from storing data about your browsing session. This includes cookies, temporary Internet files, history, and other data. Toolbars and extensions are disabled by default. See Help for more information.

a.k.a. "porn mode"

Despite this being touted as a miraculous innovation, I have to point out that Safari has had porn mode private browsing for several years now.

Ok, for those that have been using IE8 and find it slow to open, open new tabs, or open new windows, this Windows Fixup website seems to have resolved my issues, and others. Now my IE 8 is blazing fast...

From the site:

The problem, in most cases, is the presence of IE restricted sites and enhanced security configuration zones, which are generally created automatically by spyware removal software, such as Spybot and IESpyAd. Traditionally, the presence of these entries has been hugely beneficial, offering protection against malicious software. However, Internet Explorer 8 includes new security measures that may obviate the need for these entries, and the browser can suffer a tremendous speed hit in their presence.

So, here is the link, Fix IE8 Speed

Basically your installing an INF file that removes all Internet Explorer restricted sites, enhanced security configuration zones and trusted sites.

I was about to go back to IE7, now I am very happy.