Update to 4.9.1 not working

Hello

How many time during the update to the last version 4.9.1 ?

The bos configurator and client cannot connect to the server after 20 minutes that I have launched the update.

I can connect to windows with remote desktop.

I restart de bosService monitor but the new version is not installed.

I try to update windows and restart the entire server (windows restart) but the new version is not installed.
 .net 4.8 but is alredy installed.

Any idea about this issue ?

Best regards