I used the Janitor Bob method. My Malwarebytes Premium is the same as his. Earlier today, not only did I have my computer shutting down, not loading Windows, and running extraordinarily slow when it did start, Malwarebytes would not turn Web Protection to On, it would be stuck in Starting...
Now, I seem to be OK. Well, except for really small fonts on just about everything, icons, tabs, text, etc. But, I'm not about to mess with settings unless I'm sure everything else is back to normal again.
Thanks, CB, for the post re Malwarebytes. I'm glad to know it's not something I did and not my computer which is old but hope to nurse it through one more tax season.