Some years ago, Bitdefender released a widely popular free version of their product in a very trimmed down version with minimal settings and most of detection based on cloud lookup opposed to full fledged protection offered by their main paid for programs.
It was very popular because it was free, fast and had very high detection ratio. But then Windows 10 came and there were problems with its drivers which for some reason never got updated even though their main lineup was fully compatible already. This new version (I call it 2017 even though it doesn’t have such official name) was in beta for quite a while, but has been released into public final version.
As you can see (apart from white border of the bottom screenshot merging with my page background 😛 ) it’s again super simple. You basically have no settings to control other than one button to initiate full system scan, one protection switch which allows you to toggle protection on and off on your own. Exclusions and quarantine are only under user control once something is detected first and user decides to release the file from quarantine and exclude it. You can’t exclude things in advance by adding file or folder paths on your own like in other antiviruses. Some don’t like this, but it’s perfect for most casual users since it just protects them with minimal interference and interface that isn’t overwhelming at all.
I haven’t yet tested it’s protection capabilities, but since it’s from Bitdefender which has always been at the top of all protection charts, it should be pretty effective despite lacking a lot of advanced protective features found in their paid product.
Be aware that Bitdefender Antivirus Free requires registration of a Bitdefender account and being logged into that account within the antivirus in order to use it for free. Registration itself is free, I just wanted to let you guys know, because I know some don’t like antiviruses which require this.