Hi everyone !
Again the the firewall of Avast ask/shows me for "https" connexion request for the "speechmodeldownload.exe".

See here a screen capture :
https://extraimage.net/image/s8h4I know this "speechmodeldownload.exe" is official part of Cortana and Is not a virus !
Before, on Windows 10 - 1709, i add in "Avast Firewall" lists named "Other", "Microsoft" and "Microsoft Corporation" too, the file "speechmodeldownload.exe" located in "C:\Windows\System32\Speech_OneCore\common\" whith "Accept" option...
And everything OK, no more ask and message...
BUT UNTIL WINDOWS UPDATE

The update "Springs Fall Creator" (1803) destroyed all my hopes and despite all my efforts, and again "Avast Firewall" ask/shows me for "https" connexion request for the "speechmodeldownload.exe".
The manual addition of "speechmodeldownload.exe" in the "Avast Firewall" does not solve the problem this time.... It's disorienting.
Not using Cortana, I tried to delete "speechmodeldownload.exe", but it's a system file...

I hope I have been pretty clear in my explanations.
Did you have the same worries, did you solve it ?
Thank you to all of you.
JClaude
Windows 10 - 1803 Springs Fall Creator / Avast Internet Security 18.4.2338
PS: Sorry for my por english ;-)