Log findings:
ERROR R SIS DeleteFileAction: failed to delete file: C:\ProgramData\Symantec\Symantec Endpoint Protection\12.1.4112.4156.105\Data\CmnClnt\ccSetMgr\ccSettings_12.1.4112.4156.dat
2014-11-19T04:23:30.470Z ERROR I SIS [StartService] StartService() failed for service 'SymIRON' with error 0x0000042C.
2014-11-19T04:24:15.676Z ERROR R SIS DeleteFileAction: failed to delete file: C:\ProgramData\Symantec\Symantec Endpoint Protection\12.1.4112.4156.105\Data\CmnClnt\ccSetMgr\ccSettings_12.1.4112.4156.dat
For such errors, the only and best solution is to run clean wipe.
Make sure that all the folders & registry are cleared.
Download fresh new unmanaged package from flexnet.
Install only core files then reboot
Then add the features following reboot(s), before u add the other features.
To download cleanwipe, Download the Sepm_part2_tools...