2636145 - The service did not start due to a logon failure.

Starting  an SAP Service   SAP<SID>_<inst. nr.>  you receive a pop-up:

Windows could not start the  SAP<SID>_<inst. nr.>  service on Local Computer

Error 1069:   The service did not start due to a logon failure

or

Windows could not start the  SAP<SID>_<inst. nr>  service on Local Computer

Error 1067:  The process terminated unexpectedly.

In the last case  you can check that   the error match to a logon failure checking errors in event viewer  logs similar to one of the following:

Cannot open Profile   usr/sap/<SAPSID>/SYS/profile/<start or instance profile>.  (Error 1326 ERROR_LOGON_FAILURE: Logon failure: unknown user name or bad password.) [ntservstart.cpp 1051]

The SAP<SID>_<inst.nr> service failed to start due to the following error:
The service did not start due to a logon failure.

The SAP<SID>_<inst.nr> service was unable to log on as  <domain>\SAPService<SID> with the currently configured password due to the following error:
The user name or password is incorrect.

 In case of  too much logon failures this error can also be found:

Cannot open Profile  usr/sap/<SAPSID>/SYS/profile/<start or instance profile>.. (Error 1909 ERROR_ACCOUNT_LOCKED_OUT: The referenced account is currently locked out and may not be logged on to.)

Windows Server.

logon failure, ERROR_LOGON_FAILURE, error 1326, user name or password is incorrect, unknown user name or bad password, ERROR_ACCOUNT_LOCKED_OUT, error 1909 , KBA , BC-OP-NT , Windows , BC-CST-STS , Startup Service , Problem