Hi Bill, Have you done the basic stuff like clearing out your browser history, and deleting cookies? You will have to sign back into password protected sites, so make sure you have them.
You might also run a malware detection program like Malwarebytes. It's free and will detect and clear out the bad guys.
Beyond that I end up taking my computer to a local company that usually fixes whatever is wrong while I wait, or gives me the bad news.
Good to see you survived another harsh Florida winter.