Sorry, I'm not sure what this means: "With Chrome browser, do you have anything (apart from Bookmarks) configured?" - can you give me an example?
Here is copy of extensions:
I don't know whether I have backups. And don't know how to do them. I could ask my son when he gets back from Perth (he lives in Melbourne). He will know the answers.
Your KIS reports seem to be different from mine. Here is a copy of my Kaspersky Report/s