Not possible update of Avast [SOLVED]

I already have posted in Italian section, but I would know if someone other has the same problem. Are about 3 days that I can’t update avast 'cause it always answers “there has been an error and avast can’t update. Retry later”. I tried to repair it, but there was nothing to do. The error is there again…
Do I have to uninstall it and install it again?

Here below a shot of the answer from Avast window

  1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
  2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions…!!)
  3. Reinstall Avast with the downloaded installer from point 1.
  4. Reboot.

Thanks, but I was afraid to wait and I soved by myself.
Downloaded avast setup oiffline, switched off the connection and uninstalled actual avast. Cleaned registry with wise registry cleaner free; searched for folders and refuse files about avast to be deleted… Reboot computer and install new avast. Let it load all and do a reboot again, but this time switching on the connection.

Now everything works fine.

You’re welcome.