Hey @muellerjes, when you mean that 'extra' window are you referring to the Meeting window while in-meeting and the Zoom Window showing Chat, Phone, Meetings, etc.? Here is what I am referring to ⤵️

Or are you experiencing the 'Dual Monitor' view, which will show participants video and screen share content in two windows. You can uncheck this in the Zoom desktop client settings under 'General' ⤵️

The setting 'Show Zoom Windows while Screen Sharing' is if you were screen-sharing content, you can either enable this, whereas participants will see your Zoom Windows (Meeting Window and/or Client window). If disabled, while screen sharing, participants will not be able to see your Zoom Windows (Meeting Window and/or Client window).
I hope this helps! Let me know if you need more information or how I can provide you with further assistance on your question!
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