Hi Try....
If you have installed SEPM with Embedded database:
There are 2 things to look in here.
1) When you go to the Services.msc, check if Symantec Embedded Database Service is running or not??
2) When you open the Task Manager, under Processes, you may see the dbsrv11.exe, is that running??
Run the DbValidator from
Run the Windows Command Prompt (cmd.exe) as Adminstrator, then navigate to:
\Program Files (x86)\Symantec\Symantec Endpoint Protection Manager\Tools\
And run dbvalidator from there.