Can't play/update a game on Steam because of Avast!

Hello,

I am trying to play a game called Prototype 2 on Steam.

At first it would not let me start the game and when I click to play it, I got a suspicious Avast warning. There is an option on Steam games that allows you to scan and fix broken files so I tried that and got a 8MB update that will fix my game files.

Upon downloading this update I get this warning and the download will not finish.

http://i.imgur.com/rHeO0sA.png

This is it in my virus chest

http://i.imgur.com/frV7l3z.png

I have tried restoring, adding to exclusions and deleting it from my virus chest but it just keeps coming back and I can’t play the game.

Other games on Steam are working fine

Seems to have fixed itself, will report back if it persists.