"The Pop-Up Window That Wasn't There" was my favorite episode of the old Hardy Boys TV series.
I put in new printer cartridges on my HP DeskJet.
Now, when I print, a taskbar button for HP shows up. When I press Alt-Tab, I can see the HP window, but I can't toggle to it. If I Win-Tab, I can click in its 'Close Window' box, but I can't select it and make it my top-most window.
It LOOKS like it's trying to sell me something, or make me sign up for some *censored* HP nonsense. But since I can't actually get to the window, I can't tell it "No, go away and don't come back."
(Which I believe was the last line of dialogue in that old Hardy Boys episode).
What do I do?