I’m new in symfony2, I have an instance when I’m trying to installing vendors in windows using the below command.
php app/console bin/vendors install
after this command I got the below errors 
In mac and linux this command works but in windows it is not working properly. In windows After this command it deletes some of the folder in vendor .
Does anybody knows about this why it happens in windows?
I helped a poor (actually he uses windows seven like you, so he must be kind of rich) friend of mine the other day with the very same issue. Just install git-bash and you’ll be fine. Plus, git-bash will provide you with a waaaaaaay better cli than what you have for the moment.
You can install it from here. Make sure you check the git-bash option.