Free antivirus software with no ads

Hi all what free no ads antivirus software for windows 10 is best ?
My personal recommendation would be Windows Defender. It's built right into Windows 10 and does a fairly good job at keeping the nasties out when combined with sensible internet use i.e don't open random attachments or download stuff from suspicious sites.

The 'old' free antivirus solutions such as Avast / AVG don't offer much other than bombarding you to subscribe to a paid plan these days.