64 bit client
The application event log is full of errors stating ldblank.sys has been blocked from loading due to incompatibility with this system
The mirror driver is not showing under Device Manager, so it does not look like it is possible to remove the driver.
This is done in the Agent Configuration tool under the Remote Control --> Indicators --> Agent settings section.
Remove all instances in the registry that point to ldblank.sys
64 bit server
Screen blanking is incompatible with 64-bit OS.
In the agent options turn off the Mirror driver and/or Screen Blanking driver.