✔ 最佳答案
I use Avast for anti-virus, which is free, and to compliment that, I use Malwarebytes Premium. I pay a yearly subscription fee to use Malwarebytes Premium, but Malwarebytes protects more against malware, spyware, and ransomware.
Malwarebytes is free, but with premium you get 4, real-time shields that protect you at that moment. So if I accidentally click a link I didn't want to click, and that link has malware that is a browser hijack, Malwarebytes Premium will stop the connection before it even happens, and I won't get infected.
With the free version of Malwarebytes, you won't know if you're infected until you run a scan. But Malwarebytes I have never seen as being an anti-virus program specifically, which is why I run Avast and Malwarebytes. Plus, Malwarebytes Premium runs a daily scan.
And no, running both of these programs does not slow down my computer.