I have downloaded msi installer from planetcassandra.org/cassandra. I opened command prompt a administrator after running throw setup wizard.
C:\>net start DataStax_DDC_Server
The requested service has already been started.
More help is available by typing NET HELPMSG 2182.
C:\>%CASSANDRA_HOME%\bin\nodetool status
'C:\Program' is not recognized as an internal or external command,
operable program or batch file.
Thanks in advance