As expected , Microsoft included IE8 in the system of automatic updates of Windows Update, and immediately in the status of a critical update. Thus, in the very near future, this browser will be installed on the vast majority of computers with Windows, replacing outdated IE6 and IE7.
Even Firefox users on Windows, most of whom are Habrahabr, are recommended to upgrade, because in any case, IE is installed in the system, used by various applications and represents one of the biggest security holes.
You can block the automatic installation of IE8 on one computer or on the entire local network using the IE Blocker Toolkit utility. Or you can simply upgrade to Linux. ')
via MSDN