How do I close a page with no close button--from Windows!?

[Windows 10]

I am running Windows 10. Occasionally a full-screen page will appear suggesting and encouraging me to change or upgrade to Windows 11. NO ability to close the screen or bypass the advertisement is presented, except for the click-bait line, "Remind me later". I have to power off my computer by depressing the power-off (manual) switch, or by unplugging the computer. I immensely dislike Windows trying to hold me captive with an impassable screen. What is the answer?* Moved from Advertising

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