We had experienced this ourself, but again it was brought back to autodesk. We un-installed Autodesk, However still experienced loss. That is because of
Akamai Netsession. This program is the Downloader for Autodesk, and is the background downloader causing grief.
Look for it in your add/remove programs. Or if you want to keep autodesk, Akamai has an interface options menu. You can Disable it. That will effectively kill the net connection for Akamai and then you shouldn't experience the loss as well!
Hope this helps!
(Reference thread for Akamai and 4480
http://www.chiefdelphi.com/forums/sh...02#post1531602)