Is using a computer that says 'Activate Windows' a copyright violation?

I bought an old computer and saw that the bottom corner of the screen always had the words "Activate Windows" displayed. The device works normally so I continue to use it.

I found out that this message appears because of using unlicensed Windows, but some people also think that this is a trial version from Microsoft. I would like to ask if continuing to use the computer in this case is considered copyright infringement?

Reader Phan Anh

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