The option "Hide remote computer screen" is grayed out in Remote Control console although the mirror driver and the option to hide the remote Computer Screen is activated in Agent configuration.
The registry settings for WUSER32 show that the blanking driver is disabled.
The screen blanking option ("Hide remote computer screen") only applies to Windows XP and Windows Server 2003. Microsoft has removed this capability from the operating system in Windows Vista and later versions which prevents Landesk from blanking the screen.
For this reason it is greyed out unless the machine is a Windows XP or Windows Server 2003 device (this check box can't be made editable for any other Windows operating systems).