Since Win 11 came out and keeping up with auto updates along Win Defender[Windows Security], my Spam mail folder has been minimal. Every so often, I will get a spam email in my regular incoming mailbox. Same applies to my wife's laptop. I do run Malwarebytes FREE version, every so often to check the hard drive. Nothing has been found. Microsoft's Security Protection, does what they say it will do, Before having WIN 11, I did add and install, Webroot for years. Windows Security does not slow down our Laptops either. Once in great while my spam folder might have 10 spam emails, the next morning, but rarely. YAHOO mail, identifies spam, and puts into the spam folder.
Another thing, when I close my Web Browser, it deletes Cookies, History, and Cashe,