Hi there,
Thank you for posting your question here!
This issue on Windows 10 is usually caused by a temporary Explorer or input glitch. First, restart Windows Explorer by pressing Ctrl Shift Esc, right clicking Windows Explorer, and selecting Restart. Next, press the Esc key a few times and try dragging again, as Windows can sometimes think a drag action is still active. Also, make sure Tablet mode is turned off under Settings, System, Tablet.
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Best Regards,
Angelique P.