Why the <supr> push button doesn't work?

I usually work on a Mac. Now, my uncle borrowed me his PC and I'm trying to use the SUPR switch, but it won't work. It's not active for some sense... can anyone help me fix this? Thanks surrounded by advance.

Why the <supr> push button doesn't work?

what is a supr switch?



A real estate access card?? chat to your real estate board, it requires network access... and uncle's machine isn't set up for it!

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