Mithun,
Thank you for the suggestions. I'm trying the "Add Authenticated users" part now. But the problem with enabling BHDRVX64 is that I just can't get it installed. Whenever the installation gets to that part, it fails and then rolls back the installation. This doesn't leave any SEP services installed.
Here's the lines from the log file:
[StartService] StartService() failed for service 'BHDrvx64' with error 0x00000057.
2012-09-17T16:49:53.152Z ERROR I SIS
2012-09-17T16:49:53.152Z ERROR I SIS This action failed to execute! Dumping action paramters from the script:
2012-09-17T16:49:53.152Z ERROR I SIS Name=[BHDrvx64]
2012-09-17T16:49:53.152Z INFO I SIS ExecuteScript() - Successfully set failure event.
2012-09-17T16:49:53.168Z INFO I SIS ExecuteScript() returning ACTION_FAILED_WITH_ROLLBACK