La meilleure solution pour moi était celle-ci :
- Ouvrir une ligne de commande.
- Taper la commande suivante et presser ENTER.
netsh interface tcp set global autotuninglevel=disabled
- Redémarrer l'ordinateur.
The better solution for me was :
- Open command line.
- Type the command at the command prompt, and then press ENTER.
netsh interface tcp set global autotuninglevel=disabled
- Reboot computer
When you copy large files to or from earlier operating systems, the copy operation may be slower than expected on some Windows Vista-based computers
Microsoft Article ID : 932170 / February 24, 2007 / version 1.1
http://support.microsoft.com/kb/932170/en-us