Microsoft have recently emailed a lot of users with this advert and its a fookin scam imho!!! It points towards it being a new version of IE7, with new MSN optimizations... its nothing to do with IE7 (unless you have IE6 I suppose), what it actually does is install the MSN Search toolbar into your IE (which ISNT needed as IE7 already has a search tool), a popup stopper, which again IE7 already has, it changes your homepage to live.com and msn.com and deletes your old homepage settings, and on top of this chucks a ton of links in your favourites above everything that "you" have selected as your favourite.
Oh an it changes your default search provider in IE7 to Live Search...
And worst of all, when you uninstall, you still have to delete all the favourites manually, change your default search provider in IE7 and reset your homepage to the one you want.
And thats only what ive noticed in the last few minutes - i uninstalled it 2 minutes after I installed it last night, because I realised it wasnt anything to do with IE7.
Not on Microsoft!