Laravel - erro ao instalar

Programação
#1

Pessoal, bom dia! instalei o composer tudo certinho,mas quando vou instalar o laravel dá o seguinte erro…
alguém pra dar uma força?

Fatal error: Uncaught exception 'ErrorException' with message 'proc_open(): CreateProcess failed, error code - 0' in phar://C:/composer/composer.phar/vendor/symfony/console/Application.php:975
Stack trace:
#0 [internal function]: Composer\Util\ErrorHandler::handle(2, 'proc_open(): Cr...', 'phar://C:/compo...', 975, Array)
#1 phar://C:/composer/composer.phar/vendor/symfony/console/Application.php(975): proc_open('mode CON', Array, NULL, NULL, NULL, Array)
#2 phar://C:/composer/composer.phar/vendor/symfony/console/Application.php(748): Symfony\Component\Console\Application->getConsoleMode()
#3 phar://C:/composer/composer.phar/vendor/symfony/console/Application.php(714): Symfony\Component\Console\Application->getTerminalDimensions()
#4 phar://C:/composer/composer.phar/vendor/symfony/console/Application.php(648): Symfony\Component\Console\Application->getTerminalWidth()
#5 phar://C:/composer/composer.phar/vendor/symfony/console/Application.php(127): Symfony\Component\Console\Application->renderException(Object(ErrorException) in phar://C:/composer/composer.phar/vendor/symfony/console/Application.php on line 975
#2

resolvido!
sair da unidade C:\Users\Cleiton>

e fui pra c:\laravel onde eu tinha criado uma pasta. aí funcionou!