Hi Len, thanks for your question. Are you using OneNote for Windows from the Microsoft Store or the Office/OneNote 2016 version?
In the Windows app, Microsoft supports pasting images from other programs or the web, but copying and pasting images within OneNote itself may not always work. Make sure your OneNote is updated, use Ctrl+C and Ctrl+V to copy and paste, and use Ctrl+X to move images. If it works in OneNote Online, you can use that as a temporary option. Microsoft notes that copy/paste behavior can differ between versions, and updates often fix these issues.