si c’est un vista essaie cette manipulation et dit-moi si ça fonctionne , il faudrait réinitialiser la couche TCP/IP, c'est la commande que tu donnes (à lancer
avec les droits d'administrateur bien sûr ).
Reset the Winsock protocol Another possible cause of network connectivity problems is the mis-configuration
or the corruption of the Winsock protocol on the computer. This protocol is used by Windows to communicate with other computers and to access resources on the Internet, such as e-mail and Web sites. If there is a problem with Winsock, Windows Vista will no
longer be able to access the Internet. Caution Programs that access or that monitor the Internet, such as antivirus programs, firewall programs, and proxy clients, may be adversely affected when you reset the configuration of the Winsock protocol. If you have
a program that no longer functions correctly after you follow these steps, you may have to uninstall and then reinstall the program to restore its functionality, or you may have to repair the program by using the application’s Setup program. After the restore
point has been successfully created, reset the configuration of the Winsock protocol back to its default settings. To do this, follow these steps: 1. Click Start, and in Start Search, type cmd. 2. Right-click the cmd entry that appears
in the search results, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Continue. 3. At the command prompt, type the following, and then press ENTER:
netsh winsock reset Then, you should see the following message: Successfully reset the Winsock Catalog. You must restart the computer in order to complete the reset.
4. Restart the computer.
Source ;Microsoft (
désole c’est en anglais )
