Surprisingly, the free Microsoft Security Essentials is excellent.
It's called 'Defender' again on Win10 I think. Most of those third party ones are real resource hogs, like you said. Sam, consider uninstalling AVG and Malwarebytes and just try the MSE / Defender which comes with Windows. Plus any ad blockers you might like :)
I like the one you were using tho, Blackshire: 'Avast' ye Mateys!!
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