:)Salve,
Avast ha bloccato un sito per me importantissimo per collegarmi ai movimenti della mia banca : Unicredit - online.bancaperlacasa.it, come posso fare per ripristinarlo sul mio pc?
Grazie per la risposta 
Please post English here, else use the forum section for your language.
→ https://forum.avast.com/index.php?board=21.0
Post in English
What message does avast give?
Chrome give this message > see screenshot
The problem is not avast but the site itself.
https://www.ssllabs.com/ssltest/analyze.html?d=online.bancaperlacasa.it&latest
- This server’s certificate is not trusted (expired 3! years ago)
- Still vulnerable to POODLE attack while a simple setting change is all that is need and already known for 2(!) years
- This server supports weak Diffie-Hellman (DH) key exchange parameters. Grade capped to B.
- The server does not support Forward Secrecy with the reference browsers.
If that is how the bank deals with security, I would not trust them with my money at all.