Disallow Windows Server in Server Check

Will prevent users from use ownCloud on Windows Server 🙈

lib/private/util.php

@@ -566,6 +566,19 @@ class OC_Util {
 			$webServerRestart = true;
 		}
 
+		// Check if server running on Windows platform
+		if(OC_Util::runningOnWindows()) {
+			$errors[] = [
+				'error' => $l->t('Microsoft Windows Platform is not supported'),
+				'hint' => $l->t('Running ownCloud Server on the Microsoft Windows platform is not supported. We suggest you ' .
+					'use a Linux server in a virtual machine if you have no option for migrating the server itself. ' .
+					'Find Linux packages as well as easy to deploy virtual machine images on <a href="%s">%s</a>. ' .
+					'For migrating existing installations to Linux you can find some tips and a migration script ' .
+					'in <a href="%s">our documentation</a>.',
+					['https://owncloud.org/install/', 'owncloud.org/install/', 'https://owncloud.org/?p=8045'])
+			];
+		}
+
 		// Check if config folder is writable.
 		if (!is_writable(OC::$configDir) or !is_readable(OC::$configDir)) {
 			$errors[] = array(