The most stable official driver for the Bamboo CTH-670 on Windows 10 is version .
Reboot your PC to ensure all temporary Wacom files are cleared. Install in Compatibility Mode: Right-click the downloaded pentablet_5.3.5-3.exe file. Select Properties > Compatibility . bamboo cth-670 driver windows 10
If you encounter persistent issues, consider switching to OpenTabletDriver (pen only) or using the tablet on a Linux distribution (where the CTH-670 works out of the box with the wacom kernel driver). But for most Windows 10 users, the legacy driver remains a solid, workable solution for this classic Bamboo tablet. The most stable official driver for the Bamboo