I'm experience on avast antivirus and i appreciates it for a good performance and now my pc is free from and kind of attacks however avast have got some weaknesses which is almost miner issue for its performance what you need is just to stay updated with your antivirus and upgrade to get a new version if possible my experience on avast antivirus enables me to identify some of its weaknesses such as (avast always bloke untrusted software or simply the software that its doesn't recognize for example if you want to run crackers, activator which are illegal or not officially realized by the authorized software avast always bloke it and term as a malware or Trojan) the easy way if u want to enjoy avast is just simply close shield protection in the shield control of avast if u see it suspect a suspicious program that runs and you trust that program close shield protection and you will open after running