The presetup.cmd I'm using invokes WatchDriverSigningPolicy.exe. Here's and excerpt from setuplog setuplog 11:10:09,d:\srvrtm\base\ntsetup\syssetup\log.c,981,,SETUP: oem driver not logged: d:\drivers\005_storage\symmpi.sys -> C:\WINDOWS\system32\DRIVERS\symmpi.sys. 04/04/2005 11:10:09,d:\srvrtm\base\ntsetup\syssetup\log.c,316,,d:\drivers\005_storage\symmpi.sys was copied to C:\WINDOWS\system32\DRIVERS\symmpi.sys. 04/04/2005 11:10:09,d:\srvrtm\base\ntsetup\syssetup\syspnp.c,5325,,SETUP: SetupDiCallClassInstaller(DIF_REGISTER_COINSTALLERS) succeeded. Device = LSI Adapter, SAS 3000 series, 4-port (w/1064)(ScsiPort) 04/04/2005 11:10:09,d:\srvrtm\base\ntsetup\syssetup\syspnp.c,5337,,SETUP: SetupDiCallClassInstaller(DIF_INSTALLINTERFACES) succeeded. Device = LSI Adapter, SAS 3000 series, 4-port (w/1064)(ScsiPort) 04/04/2005 11:10:10,d:\srvrtm\base\ntsetup\syssetup\syspnp.c,5377,,SETUP: SetupDiCallClassInstaller(DIF_INSTALLDEVICE) suceeded. Device = LSI Adapter, SAS 3000 series, 4-port (w/1064)(ScsiPort) 04/04/2005 11:10:10,d:\srvrtm\base\ntsetup\syssetup\syspnp.c,3154,,SETUP: Device successfully installed. 04/04/2005 12:37:19,d:\srvrtm\base\ntsetup\syssetup\log.c,316,,Setup detected that the system file named [c:\windows\system32\drivers\symmpi.sys] is not signed properly by Microsoft. This file has been restored to the correct Microsoft version to maintain system stability.