Index: /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py
===================================================================
--- /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py	(revision 64940)
+++ /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py	(revision 64941)
@@ -443,4 +443,5 @@
     ktReason_Guru_VINF_EM_TRIPLE_FAULT                 = ( 'Guru Meditations',  'VINF_EM_TRIPLE_FAULT' );
     ktReason_Host_HostMemoryLow                        = ( 'Host',              'HostMemoryLow' );
+    ktReason_Host_DriverNotLoaded                      = ( 'Host',              'Driver not loaded' );
     ktReason_Host_Reboot_OSX_Watchdog_Timeout          = ( 'Host Reboot',       'OSX Watchdog Timeout' );
     ktReason_Networking_Nonexistent_host_nic           = ( 'Networking',        'Nonexistent host networking interface' );
@@ -691,4 +692,5 @@
         ( True,  ktReason_Host_HostMemoryLow,                       'HostMemoryLow' ),
         ( True,  ktReason_Host_HostMemoryLow,                       'Failed to procure handy pages; rc=VERR_NO_MEMORY' ),
+        ( True,  ktReason_Host_DriverNotLoaded,                     'Error opening VBoxDrvStub:  STATUS_OBJECT_NAME_NOT_FOUND' ),
     ];