I have been a McAfee member for 18 months but unable to activate your key. too complicated I am 84 y

Hi, HARRYSTEWART 

Microsoft Defender , is an excellent product that provides security.

I suggest you do this step:

https://www.mcafee.com/support/?articleId=TS101331&page=shell&shell=article-view

https://www.bing.com/videos/search?q=how+to+remove+mcafee+products+from+your+windows+pc&view=detail&mid=C32F7D847D132A9D1793C32F7D847D132A9D1793&FORM=VIRE