Avast slowing down computer 2019

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> Web Shield - scans all files on HTTP protocol level, also scans files inside archives > File System Shield - scans all files on-access, doesn't scan files inside archives for minimal performance impact but no less protection as well But they are not and they in fact compliment each other. If you think all shields are useless, so be it. Click to expand.You don't seem to have enough knowledge to judge anything.