I wasn't sure what that link was for, either, as I'm not familiar with Avast Browser Cleanup Tool is, as I don't have an Avast Browser, at least so far as I'm aware of. Thanks for your reply. What's the next step? I'd really like to get my Start Page back. I wonder if rebooting would help. It can't hurt to try, anyway.
On an unrlated note, I can hardly read the Verification thing I have to fill out in order to post. On some of them, I'm not able to read them. I have to Request another image a number of times before I can find one I can read. The contrast and the busyness is too much.