How do I enable copy and paste?

Enable the “Use Ctrl+Shift+C/V as Copy/Paste” option here, and then click the “OK” button.

Why copy paste is not working?

If, for some reason, the copy-and-paste function isn’t working in Windows, one of the possible causes is due to some corrupted program components. Other possible causes include antivirus software, problematic plugins or features, certain glitches with the Windows system, or a problem with the “rdpclicp.exe” process.