Some people are experiencing machines that won't boot and other problems. Please see this article for more information:
http://support.microsoft.com/kb/2982791
For some reason that link is no longer available so I'll post a link to the Google cached page:
http://webcache.googleusercontent.co...hl=en&&ct=clnk
http://support.microsoft.com/kb/2982791
For some reason that link is no longer available so I'll post a link to the Google cached page:
http://webcache.googleusercontent.co...hl=en&&ct=clnk