After you choose suitable security software, you can either go for Avast free antivirus download or buy its paid subscription for availing all premium security features and functionalities. Before you begin Avast free virus protection download, it is required to check your system specifications. After you confirm everything, go to Avast website, select your product, and click Download trial.
In both free trial and paid subscriptions, it may happen that you experience a technical fault during downloading, installation or activation. Moreover, an error can also occur at the time of scanning or while you configure Avast free antivirus settings. Apart from these situations, Windows or Mac OS compatibility issue may also cause the antivirus not function properly.