IE7 is forced upon you by Microsoft'a Automatic Updates, although you can revert to the more flawed IE6 at a later date.
If IE7 is your only web browser head over to www.getfirefox.com to download Firefox 2 and re-discover the web.
Person 2: Have you not heard of Firefox
Person 1: No, what is it?
Person 2: Mozilla's web browser that MS copied to release IE7.
In addition to these features it also goes a long way to conform to the W3 web standards such as CSS2 which many programmers complained about in IE6.