I tried to upgrade our system over the weekend on a Winddows 10 Computer. We are on a fully patched V15.5 with a "real" public certificate installed. I backed up the entire system and unstalled V15.5. Rebooted and started the V16 install. When the install gets to the point of trying to get a certificate, it just hangs. After 600 seconds, it times out and throws an error message about not being able to aquire a certificate.
With V15.5, the installed asked for the public certificate and installed it as part of the install. This did not. I was only guessing that this was trying to use the certificate from the backup? This is a Comodo certificate.
I am going to guess this is a bug and should be looked at before this goes final.