I read tutorials on net and try to start using laravel but first I need to install homestead... I do everything like I read but pease help me with this:

[MY SCREENSHOOT](http://i.stack.imgur.com/Y7Xlq.png)

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> why at every command I get 'php' is not reconizes as an internal ...
>  ...
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Please help, i'm new to homestead and laravel, before thi question I try almost everything...
Why I get this messages at CMD? What is wrong here?