What can I do if service of MyReport Server is not able to start?

The error message is: “ Unable to start service MyReport 5 Server on Local Computer" Error 5: Access is denied.
Right click on the application Server5.exe >> then Properties >> (Program Files >> ReportOne  >> MyReport5) 
>> In Security tab >> click Add >> Click on Object Types >> ticked Built in security principles >> then press OK 
>> Click Advanced >> and then Search >> Select NETWORK SERVICE >> then press OK 
 >> Close the Select Users or Groups by clicking on OK.
Add right Full Control to NETWORK SERVICE and validate.