OK, after reboot, there is no more connection attemp.
But if I start again avast say it to be resident without update (I did it manualy some minutes sooner) and then reboot, I still have avast which tries to connect.
Also what is the interest to have the choice to manualy update avast if it doesn't care :-(
Avast it a good product against the virus, but still need some improvement to be more flexible.
Example, I don't want it to scan my emails, so I need to stop it and reboot my PC before being able to get my emails grrr....