Silvia Fondo,
Unfortunately, the Windows Genuine Advantage (WGA) support forum is able to provide support in English only. Please open the following URL: http://support.microsoft.com/common/international.aspx . This website will help make sure you receive the appropriate support information for your location, select your region setting from the list below and then click the arrow button. Next search the page and locate the service which you require. Have a great day and thank you for visiting the OGA Forum.
Thank you very much
Stephen Holm, MS