This is a tricky one.
I have a Broadband Connection.
Whenever my Internet loses connection maybe due to human error or power failures and i didnt had the opportunity to manually Disconnect it, The Remote Acces Dialer tries to reestablish the connection.
This results in System hang.
Becames unbearably slow, Tried to end Process RASAUTOU.EXE (which i beleive is the culprit) or explorer.exe (which usually works) but i still cant Reconnect to internet now as the option of "Connect" only will be unlocked after Restart. (assuming that i managed to end process - which most of the time becomes Impossible.)
Dont know if i can post other links in here for your and mine help.
Its a similiar question asked on Microsoft Answers, maybe it will help you come to a solution.
http://answers.microsoft.com/en-us/windows/forum/windows_7-networking/system-hangs-remote-access-dialer-rasautouexe/d0b2e41b-df99-4a0f-a170-797eac9447f9?msgId=2951561d-7864-4563-86a7-38f9f333bc5e