I am having the same problem with ProSeries Professional and have been on and off the phone with Intuit support yesterday and today.  I had VPN turned on and did not know that.  We turned it off and reloaded from the disk.  I was able to re-install, but know I dont have the States and I am unable to update again.  I will call Intuit again tommrrow.  I am dead in the water for now.  I had backed up my client data so I was able to restore that after re-install.