HP has lots of different kinds of computers. Make and model? Although you've indicated it has Windows 10, did it come with that installed or did you upgrade from another OS to Win10? Are these screens showing when you open a browser, if so, which browser, or do they show up all the time when using some other program? When do you see the screen and what do they look like?

If they open with a browser, have you tried turning ON the pop-up blocker?

Hope this helps and let us know more.