ADALM Pluto question iio_info -s error

I am using WIN 10. I have all the drivers loaded. I cannot access the module via CMD:

C:\>iio_info -s
'iio_info' is not recognized as an internal or external command,
operable program or batch file.

I am able to log into the module via Putty and the D drive is active. 

Any guidance would be appreciated.  

Regards

Gray