Are you running any kind of security software, or are you using some sort of proxy scanning your web activity?

Just using Mcafee.

I would guess it is another example of yahoo pushing adds, but I might b wrong.

You can try to start Windows 10 in safe mode with networking enabled.

Does the problem go away?

Windows safe mode disables anti-virus software. This is a troubleshooting step, not a solution.

Has Mcafee auto switched on a VPN ?

I had Norton do an update and unbeknown to me, it added and activated a VPN. It was causing me no end of problems, sending good valid links to websites that were not expected.

I ran into the same problem and assumed it was just a Trojan Horse attempt to get my Yahoo login & password. But then I noticed that I wasn't getting any new messages in my Yahoo account. So when one of the pop-ups said it was from opus.analytics.yahoo.com then I really did log in, and I haven't had any issues since.

It is creepy though. I don't see why the "casalemedia" is connected here. I'm running Ubuntu 22.04 and have FireEye installed. Maybe Yahoo is running some ad-ware here, or casalemedia is connected at their end for some reason.

I ran into the same problem and assumed it was just a Trojan Horse attempt to get my Yahoo login & password. But then I noticed that I wasn't getting any new messages in my Yahoo account. So when one of the pop-ups said it was from opus.analytics.yahoo.com then I really did log in, and I haven't had any issues since.

It is creepy though. I don't see why the "casalemedia" is connected here. I'm running Ubuntu 22.04 and have FireEye installed. Maybe Yahoo is running some ad-ware here, or casalemedia is connected at their end for some reason.