Windows cannot verify the digital signature for the drivers required for this device

Scenario

1. Wacom tablet driver has been installed on the PC
2. The appropriate graphics driver (MCT or DisplayLink) has been installed
3. Wacom Tablet Properties displays an error "Your device is not connected to your computer"
4. Device Manager reports error 52: "Windows cannot verify the digital signature for the drivers required for this device"
5. Windows Update KB 3153171 has been installed or is not appropriate for the computer

Probable solution

It is very likely that the computer does not have the necessary SHA-2 driver signature support. This was distributed through Windows updates, and the customer can review their installed updates to see if it's installed.
SHA-2 driver signatures are required for all new hardware drivers produced after October 2014. SHA-2 driver signatures are native to Windows 8 and Windows 10, but not to Windows 7.
Without the necessary update, Windows 7 will believe that a driver signed with SHA-2 is invalid, as it will not recognize the signature.

More information on this can be found in Microsoft's Support articles for the associated KB updates here: https://docs.microsoft.com/en-us/security-updates/securityadvisories/2015/3033929