apparently there's an email circulating, claiming to be from support@microsoft.com, that asks you to visit a website and download Internet Explorer 7 RC1.
if any of you get this email, DO NOT visit the site. It is full of trojans that exploit your web browser vulnerabilities.
http://www.theregister.co.uk/2006/10/18/hack_site_spoofs_ie7_download/
one IE7 site that is safe to visit is: http://www.ie7.com/
definitely worth a look