Software Distribution results in "The exit code is 1, the execution status is FailureNonRetry"

I am using sccm 2007 to deploy Symantec Edntpoint Protection. The software is installed OK but the execmgr.log shows "The exit code is 1, the execution status is FailureNonRetry" and registry entry for the package shows failure code 1 and status as failure. However, the application runs properly without any problem.
I recall that someone posted that if you let the system to reboot after installation, the installation would be logged as successful. However, I tried both "Software restarts computer" and "ConfigMgr restarts computer", but both configuration settings did not re-start the computer and I still get exit code 1.

Any suggestions?

I am also wondering if there is anyway to prompt the user for a manual reboot of the system after the installation.

Thanks.

Stephen