Two possible solutions:
PATH
c:\program files\git\cmd
One more: If your path includes spaces, enclose it in quotes:
set PATH=%PATH%;"C:\Program Files\Git\cmd"
During Git installation, in the path environment settings chose the following one.Even I had the same problem, of git not executed on my normal Command Line, but i just reinstalled it with the setting "Run Git from the Windows Command Prompt"
Just open cmd and run this command:
