This occurs when the background Windows service fails to start automatically. Press Windows Key + R to open the Run dialog box. Type services.msc and press .
Wacom does not offer a dedicated Windows 10 driver explicitly built for the Bamboo CTH-670. Despite this lack of official, modern support, the final driver released for the Bamboo line works exceptionally well on Windows 10 when installed correctly. bamboo cth-670 driver windows 10