Bitdefender antivirus is it! I have been using this free antivirus on my laptop now for about two years and it just works like I expected it to. Works just fine. You miss nothing if you don’t opt for the likes of Avira or Avast, seeing that I know the downsides to those ones too.
It quickly cleans off invaders and lets you know immediately, at the right time, it scans your system, and finds the bad fellows, lets you decide what to do with them.
It keeps on updating itself automatically without your insistence. Try it and see. Just search for it on Google and install it on your system, then let it do its magic.
If you search online, make sure you download the free version from the product website.