Thanks to LesMoss, by dismounting the AC7260, boot the ppc, reinstalling it and reboot, now the Intel BT 4.0 driver has been installed by Win7 and the BT works fine!
No words to comment this behavior, and the fact that this process is not described officially!!
Last thing: there is a software method or an application to stop the BT (different and more affordable than disable it by the Device Manager)?
Regards