Hi,
I have solved the problem.
It was due to the BIOS of the mainboard, ASUS P7P55D, had some bugs on it.
After updating the BIOS, it works.
Thanks anyway.
Dear all,
I have installed a Windows 7 Prof. 64bit (Build 7600) on my PC (Asus P7P55D mainboard),
I have tried 2 USB Wifi network adapter (ASUS USB-13N and LevelOne WUA-0615), and both have the same problem.
Everything works fine except the wifi network adapter keeps "Disabled" even I have...