What causes these warnings?

[Gerry56]

Several times over the past couple of days, Avast has shown my the warning attached. Last time it happened, I was not using my browser. So, my question is simply this: What is this and from what program might the issue be sourcing?

Any guidance you can offer will be welcomed. Thanks.

[DavidR]

Stick to one topic, three topics just causes duplication of effort for those trying to help.

Ordinarily duplicates would be deleted, but that would require you to get past the Captcha again, required for the first three posts (anti-spam measure).