ERROR_KM_DRIVER_BLOCKED - 1930 (0x78A)
The printer driver is not compatible with a policy enabled on your computer that blocks NT 4.0 drivers.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_KM_DRIVER_BLOCKED with the numeric value 1930 and hexadecimal representation 0x78A signifies that a driver, specifically a printer driver, is not compatible with an enabled policy on the system. This policy typically restricts the use of certain drivers based on their compatibility or security considerations.
Error Details
This error code is indicative of a capability issue where the operating system enforces policies to prevent the installation or usage of specific types of drivers. In this case, the policy in question targets NT 4.0 drivers, which are not compatible with the current system configuration or policy settings.
Usage Context
The ERROR_KM_DRIVER_BLOCKED error is typically encountered when attempting to install or use a printer driver that has been flagged by an enabled policy on the system. This can occur in scenarios where security policies or compatibility checks are enforced, such as in corporate environments with strict driver management policies.
Developer Interpretation
Developers should interpret this error code as indicating a failure due to a mismatch between the driver being used and the current system's policy settings. The error suggests that the printer driver is not compatible with an enabled policy on the computer, which may be related to its version or other attributes such as security or compatibility.
Related Errors
- ERROR_DRIVER_NOT_FOUND: Indicates that the required driver could not be located.
- ERROR_INVALID_DEVICE_STATE: Suggests that the device state is invalid for the operation being attempted.
- ERROR_BAD_DRIVER_LEVEL: Implies that the driver level is incompatible with the system version.
FAQ
Q: What does ERROR_KM_DRIVER_BLOCKED mean?
A: This error indicates that a printer driver is not compatible with an enabled policy on the system, preventing its installation or usage.
Q: How can I resolve this issue?
A: Ensure that the printer driver you are attempting to use is compatible with your current system configuration and any enforced policies. Contact your administrator for assistance if necessary.
Summary
The ERROR_KM_DRIVER_BLOCKED error code, 1930 (0x78A), signifies a compatibility issue between a printer driver and an enabled policy on the system. Developers should interpret this as a capability issue and ensure that drivers are compatible with their intended usage context.