I am running Win 10 also. Norton Security is not free, but it is worth every penny. Have been using it for years, still do.
I highly recommend it. You don’t have to do any strange setup, it does what it has to do, protect your computer against malware of all kinds.
I also am running win 10 with Norton on a 2+ year old Toshiba laptop and have had no problems. Comcast provides Norton free with their cable internet.