My name is Rohit and I work for the Social Media and Community Team at Dell.
Please provide the error code you are getting while you are doing updates so that we can further help you on this and you can also try doing the manual updates from this website and check if that works http://bit.ly/fopBX. You can also try turning off and on your firewall and you will get steps from this link http://bit.ly/10TJoY.
Please reply back with the results.
Glad to assist you!
Thanks and regards
Dell Social Media Responder