In IE, goto Tools>Internet Options>Programs and check the dropdown box for "email". What does it contain? What did it contain before you installed Windows 7?
In the past, when I clicked on an email link in my IE browser, it launched Gmail for me. Now, with Windows 7, it launches MS Outlook.
I poked around in the help for IE, and it appears that the only way to stop this behaviour is to remove Outlook, which I really don't want to do.
Is there some easy way I can force email links on webpages to open my Gmail account?