Hello
Just in case it will interest someone else:
Yes the “speechmodeldownload.exe” is official part of Cortana.
The Avast Firewall in “Automatic” (not on demand) mode actually adds it to the “Other” part of firewall (without signature, without path, without name: http://nsm07.casimages.com/img/2017/11/22//17112212094422768615381154.png ) which is very curious because it is very different if one tries to add the same “speechmodeldownload.exe” in the list of the firewall which appears signed there and with a path and a name: http://nsm07.casimages.com/img/2017/11/22//17112212094322768615381153.png
Yet it’s the same file.
In “On Demand” mode, nothing happens, that we Accept or that we Refuse ?!?!

But, if we open directly on the file “speechmodeldownload.exe” located in "C:\Windows\System32\Speech_OneCore\common" (there is another of different size but same date in “C:\Windows\SysWOW64\Speech_OneCore\common", nothing happens if we open it), and we Accept/Refuse in the firewal, the file” speechmodeldownload.exe "is added in the list “Other” but without signature and there it works, no more message every morning. :slight_smile: