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WTF.
How is it not working? It works fine on all machines I have, Linux, Windows 10 and OSX.
Have you tried installing the drivers in case that's actually important? Are you on some old Windows? Have you checked the mouse settings in the control panel?
I presume you've done all of this already because you know what you're doing, but Razer's have been my go to mice for years precisely because they work everywhere without hiccup or issue... even Linux (where nothing ever works first time).
New computer time