Moto官方纯驱动，更新其实已好久。

http://developer.motorola.com/tools/usb_drivers/

下载：(32-bit)
http://developer.motorola.com/tools/usb_drivers/handset_usb_driver/Motorola_End_User_Driver_Installation_5.9.0_32bit.msi/

下载：(64-bit)
http://developer.motorola.com/tools/usb_drivers/handset_usb_driver_64/Motorola_End_User_Driver_Installation_5.9.0_64bit.msi/