Okay that's completely different. Hmm.
You can probably ignore the long text below. It was my first idea for fixing the problem, but then I realized there's an easier way.
Open the Internet Properties dialog (either from Internet Explorer, or from the desktop icon, or from Control Panel). On the Programs tab, make sure Email is set to use Outlook. I'm thinking maybe it's set to Hotmail right now, which would cause links to open a browser window but I don't know why it would make 60 windows open.
(ignore this part probably)
You can check to see whether that URL type is associated in an odd way. Open a Windows Explorer window, go to Tools, Options. On the File Types tab, locate the URL:MailTo Protocol and click the Advanced button. There should probably only be "open" as the actions available. If you edit that, it should show that it's pointing to Outlook's executable file. If it's not set to that, you can try hitting the Set Default button. That may or may not set it to msimn.exe, which is Outlook Express. I don't know if you're actually using Outlook Express or Outlook. If you can't make it automatically link to Outlook, you may be able to force Outlook to reset the association by making it not the default application for mail.