I've been working on this issue for nearly 2 weeks. Decided to rebuild the server for one of my servers. Tried the install on the newly build server with a fresh download of SMP 7.1 SP1 and got the same failure.
1603 MSI error when attempting to install altiris_ns_7_1_sp1_x64.msi.
Found this error in the install log:
** NSInstaller.Install started **
Loading MSI
MSI Location: F:\Program Files\Altiris\Symantec Installation Manager\Installs\Altiris\altiris_ns_7_1_sp1_x64.msi
Calling custom actions
Applying registry permissions
An exception occurred during the Install phase.
System.SystemException: The trust relationship between the primary domain and the trusted domain failed.
Any ideas?