Probleme de connection...

bonjour,
je n'arrive plus a me connecter à facebook et a gmail via mon pc fixe.
(par contre j'y arrive via mon tel lorsque le wifi est coupé...)
voici le message qui s'affiche lorsque j'essaye :

Secure Connection Failed
The connection to the server was reset while the page was loading.
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.

merci d'avance pour votre aide