I have somewhat a similar incident, this never happened before, but anyway I've attached three images to show that this is from avast, I thought this was a virus or something, it was a scare at first seeing those warning dialog boxes. I'm wondering why can't Vista associate this with Avast, should I install the certificate also?
I have not installed the update just yet maybe this will update itself again later, but... I was hoping for anyone to comment on this first on why avast update wasn't identified by Vista when for a few months now it was able to recognize avast, but after the last program update I had, this issue came out.
Thanks