Just for information.
On my laptop I received the notification for an update. While installing
I had the error:
The following error has occurred:
System.UnauthorizedAccessException: Accès refusé. (Exception de HRESULT : 0x80070005 (E_ACCESSDENIED))
à MailClient.Utils.IApplicationAssociationRegistration.SetAppAsDefaultAll(String appRegistryName)
à MailClient.Program.Main(String args)
Fortunately, after a few pop-up windows and clicks. I closed eMClient and when it restarted, anything has been ok.