Cinq nouveautés de Windows 8.1

http://www.youtube.com/v/zFkMmdSDisQ?version=3&autohide=1&autoplay=1&showinfo=1&attribution_tag=kbucXsgMTnvodRqWCgHt4Q&feature=share&autohide=1

https://storage.googleapis.com/support-kms-prod/SNP_2621235_en_v1