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There are many choices in a new computer - AMD or Intel, as well as models within each family. Which work best with COW and stockfish?

Welcome back forum!

Stockfish has a guide for their product:
https://stockfishchess.org/download/
and
https://stockfishchess.org/download/windows/
It will take some research to cross-reference technical names to popular names,

COW gets a favorable review about 25 minutes into the following video:
https://www.youtube.com/watch?v=M8ALdU5D9Ns

Stockfish discusses GUIs

https://www.chessprogramming.org/GUI#Chess_GUIs

I don't see Chess Openings Wizard. I see Chess Wizard. Maybe the same thing? Anyway, no information is provided.