Hopefully that will continue since you found that those addons turned out to be at least one source of the problem. With one installation of Vista here every system restart still sees the need to open up a window for the bcdedit.exe/set mx AlwaysOff command in order to get online.
Fortunately that's being seen on a drive removed and then had to be reinstalled just to see more files saved from it. But if you run into anyone else you know having log on probelms running Vista tell them about the manual method used here for a temporary period anyways.