diff --git a/command.php b/command.php
index 9966921..d198cd8 100644
--- a/command.php
+++ b/command.php
@@ -8,10 +8,16 @@
  * Open /wp-admin/ in a browser.
  */
 $wp_admin = function() {
-	$exec = 'xdg-open';
-	if ( 'DAR' === strtoupper( substr( PHP_OS, 0, 3 ) ) ) {
-		$exec = 'open';
-	}
+    switch ( strtoupper( substr( PHP_OS, 0, 3 ) ) ) {
+        case 'DAR':
+            $exec = 'open';
+            break;
+        case 'WIN':
+            $exec = 'start ""';
+            break;
+        default:
+            $exec = 'xdg-open';
+    }
 	passthru( $exec . ' ' . escapeshellarg( admin_url() ) );
 };
 WP_CLI::add_command( 'admin', $wp_admin );