Hello,
Upon checking the Logs, it shows errors as below:
MSI (s) (74:D4) [21:54:21:421]: Executing op: ActionStart(Name=StartServices,Description=Starting services,Template=Service: [1])
AddCacheAsInstallSource Successfully added C:\ProgramData\Symantec\Symantec Endpoint Protection\12.1.1101.401.105\Data\Cached Installs\ as source dir for {4ADBF5BE-7CAF-4193-A1F9-DE6820E68569}
MSI (s) (74:D4) [21:54:21:421]: Executing op: ProgressTotal(Total=1,Type=1,ByteEquivalent=1300000)
MSI (s) (74:D4) [21:54:21:421]: Executing op: ServiceControl(,Name=SepMasterService,Action=1,Wait=1,)
MSI (s) (74:D4) [21:54:55:477]: Product: Symantec Endpoint Protection -- Error 1920. Service Symantec Endpoint Protection (SepMasterService) failed to start. Verify that you have sufficient privileges to start system services.
Error 1920. Service Symantec Endpoint Protection (SepMasterService) failed to start. Verify that you have sufficient privileges to start system services.
MSI (s) (74:D4) [21:54:55:477]: User policy value 'DisableRollback' is 0
MSI (s) (74:D4) [21:54:55:477]: Machine policy value 'DisableRollback' is 0
Action ended 21:54:55: InstallFinalize. Return value 3.
Suggestions:
1) Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\SMC
2) Select and right click SMC and choose Permission from the drop down menu
- In permissions add the User, Administrator and SYSTEM with full permission
3) Make sure the SYSTEM and Administrators accounts have full control to:
C:\Windows\
C:\Windows\System32\
C:\Program Files (x86)\Common Files\
C:\Program Files (x86)\
4) Reboot the machine.
Hope that helps!!