Thanks for all of your help...
The entire log is very long so I only include the following, thanks:
Property(S): ProductState = -1
Property(S): PackageCode = {28CC52FB-8519-454F-9C84-EF99135C3EF8}
Property(S): MsiLogFileLocation = W:\Share\Users\BBYeung\AppData\Local\Temp\MSIfdbb1.LOG
MSI (s) (A8:20) [13:27:06:671]: Note: 1: 1708
MSI (s) (A8:20) [13:27:06:671]: Product: Symantec Endpoint Protection -- Installation operation failed.
MSI (s) (A8:20) [13:27:06:671]: Windows Installer installed the product. Product Name: Symantec Endpoint Protection. Product Version: 11.0.4202.75. Product Language: 1033. Installation success or error status: 1603.
MSI (s) (A8:20) [13:27:06:671]: Cleaning up uninstalled install packages, if any exist
MSI (s) (A8:20) [13:27:06:671]: MainEngineThread is returning 1603
MSI (s) (A8:D8) [13:27:06:671]: Destroying RemoteAPI object.
MSI (s) (A8:94) [13:27:06:671]: Custom Action Manager thread ending.
MSI (s) (A8:D8) [13:27:06:671]: No System Restore sequence number for this installation.
=== Logging stopped: 5/28/2009 13:27:06 ===
MSI (c) (B0:50) [13:27:06:671]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1
MSI (c) (B0:50) [13:27:06:687]: MainEngineThread is returning 1603
=== Verbose logging stopped: 5/28/2009 13:27:06 ===