hello
I bought 2 days ago Avast Internet Security( key )from G2A site
and I cannot activate
I got this massage
I am not familiar and never heard G2A site and buying Avast from there. You should always buy it from official website from avast. Did you try to repair avast via add/remove? After that try to activate.
I did what you told me its the same
HOW DO I KNOW IF ITS FAGE OR NOT
avast support https://support.avast.com > submit a support ticket