Best Antivirus for new Laptop

I have recently brought a new Sony laptop and require a new antivirus which would not consume a lot of power and also that would not be as costly. Previously with my desktop I was using Kaspersky which I had because of some offer, but if I would have to purchase it would be too costly and not affordable for me, which is why I am looking for a new antivirus that isn't too expensive and works well.