Failed to start service, error 2. TNS-12560: TNS:protocol adapter error TNS-00530: Protocol adapter error
Check the tnsnames.ora file in below navigation directory:


Drive_Name:\OraHome_1\network\ADMIN 


Check the file property with installed oracle service details


EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10..)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = PLSExtProc)
    )
  )


Also check the tnslistener along with it's service.