The installation or upgrade of Symantec Endpoint Protection 12.1 or 14.x rolls back while trying to start the Intrusion Prevention driver, or IPS definitions fail to update.
SIS_INST.LOG
2016-11-01T07:24:14.492Z INFO I SIS Executing action ( 4457 ) - StartService currentPosition: 1980244 2016-11-01T07:24:14.523Z INFO I SIS [StartService] QueryServiceStatusEx() for service 'IDSVia64' returned ssp.dwCurrentState: 0x00000001 2016-11-01T07:24:14.695Z ERROR I SIS [StartService] StartService() failed for service 'IDSVia64' with error 0x00000003. 2016-11-01T07:24:14.695Z INFO I SIS [StartService] QueryServiceStatusEx() for service 'IDSVia64' returned ssp.dwCurrentState: 0x00000001 2016-11-01T07:24:14.695Z INFO I SIS [StartService] QueryServiceStatusEx() for service 'IDSVia64' returned SERVICE_STOPPED or SERVICE_STOP_PENDING - will fail the action!
Event Viewer:
Event ID 7000
"The IDSVia64 service failed to start due to the following error:
The operation completed successfully. (0x00000003)"
SEP System Log:
The latest Intrusion Prevention Signatures update failed to load. The component will continue to use its previous content.
This can occur if case sensitivity for files and folders has been enabled in Windows. The setting is controlled by HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\kernel\obcaseinsensitive.
Disable case sensitivity by changing the value for obcaseinsensitive to 1 and rebooting the computer.