ping : The term 'ping' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
From the desktop, Right click 'Computer', click 'Properties'
then click 'Advanced system settings'
- this should bring up the System Properties - Advanced tab
Click 'Enviornment Variables'
Select the system variables 'PATH'
Edit PATH and add this line to the front
c:\windows\system32;
or to be generic (in case you've installed windows on a different drive)
%SystemRoot%\system32
Start a new command window to check if this has worked (or reboot)
existing command windows will use the old path