Got an email telling me that Cleanup is free. I went to use it, and got hit with the same old nagwall telling me I have to pay for it first! WTF, Avast? There are plenty of things I love about avast! Premier… but THIS isn’t one of them. Free or not… make up your bloomin’ minds, already!!!
You can read up on the ‘Avast Clean up’ Information,
https://www.avast.com/faq.php?article=AVKB211
Ah, yes. Somehow I missed the license box completely. (My bad.) Once I got that straightened out, I was able to run it. Only problem is, it completely fouled up (and that’s the nicest term I can use) my Windows 10. The Groove Music player is no longer recognized, and nothing happens when I click on the Start Menu, either.
Can’t win for losing.
How do I fix that? Or is my Windows 10 irreversibly damaged?
I’d appreciate an answer as soon as possible. Thanks.
Problem solved.
It involved losing four hours of sleep while I completely re-installed Windows 10, but at least everything works now. 
And NO, I will NEVER make the mistake of using avast! Cleanup ever again!! >:(
(As a matter of fact, I will just ignore its existence entirely, thank you very much! 
)