i have downloaded several drivers, all are .inf format for Win764BIT because i am under Win864BIT .. but when i am trying to install the driver via device manager it says the drivers are not digitally signed .. and when i try using SP Flash Tool to test to flash stock rom to my currently working device .. it does not start, so i think it is not detected .. please help .. i am using a PH Version of CUBOT C11 (MT 6572) Device .. i can't try to make it work .. please help