Error when install plugin on Wp 3.9.1

I was install some plugin on wordpress.org when was error:
( i used wordpress 3.9.1)

Warning: An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in C:\AppServ\www\wordpress391en\wp-includes\update.php on line 119
Please your reply.
Tks.