Magento – ERROR: the “MEQP2” coding standard is not installed

Magento Docs are saying

If a class’s constructor is particularly resource-intensive, this can lead to unnecessary performance impact when another class depends on it, if the expensive object does not end up being needed during a particular request.

Magento has a solution for this situation: proxies. Proxies extend other classes to become lazy-loaded versions of them. That is, a real instance of the class a proxy extends is created only after one of the class’s methods is actually called. A proxy implements the same interface as the original class and so can be used as a dependency anywhere the original class can. Unlike its parent, a proxy has only once dependency: the object manager.

Proxies are generated code and therefore do not need to be manually written. (See Code generation for more information.) Simply reference a class in the form \Original\Class\Name\Proxy, and the class is generated if it does not exist.

Magento 2 Proxies

So, in your case

/**
 * Checkout session object
 *
 * @var \Magento\Checkout\Model\Session\Proxy
 */
protected $checkoutSession;

/**
 * Constructor
 *
 * @param  \Magento\Checkout\Model\Session\Proxy $checkoutSession
 * @return void
 */
public function __construct(\Magento\Checkout\Model\Session\Proxy $checkoutSession)
{
    $this->checkoutSession = $checkoutSession;
}

Note \Proxy suffix for the object \Magento\Checkout\Model\Session

I think it creates an Issue because you are passing cd(change directory) in your command. try to execute without it. And one more thing If you are using Window OS then you need to make sure about slash (forward / or backward ).

Try with below command,

C:\xampp\htdocs\m2fresh\magento-coding-standard\vendor\bin\phpcs C:\xampp\htdocs\m2fresh\app\code\Vendor\Module\ --standard=MEQP2