Yep i had the same problem with my Dell computer,i stopped mine from starting up.I spent 3 days trying to get my brand new Dell computer to stay on line !It was driving me nuts, i had to stop the controller,the inbuilt modem and then Dell network assistant.I have just uninstalled,Dell media experience,as it kept looking for a disc,and after calling Dell and being fobbed of ,and 5 emails later,i am still waiting for the disk they promised to send,i uninstalled it ! Apart form all that ,its a much better computer than my Packard Bell.
So Simple, I wish Dell had told me that if i was using Aol and bt modem,i would have to disable the inbuilt modem. I spent 3 long days,trying to figure out why i couldnt get connected,3 things i had to disable, i did uninstall them first,thinking that would work,but of course ,they just got installed back again when i booted back up. But its up and running really good.
Know how you feel, my wireless connection was conflicting with Dell Network Assistant for the same 3 long days until I disabled it. I'm sure Dell try to be helpful and work to the lowest common denominator, guess they've found a new one with me!