you can may try to disable the power management features of the wireless card itself.
i have the same issue myslef on an usb card, tried everything still not solved, but this solution can help you.
you can also set the wireless preference to "maximum performance" in the power management settings in windows panel.
--double check on website for your wireless drivers.
you can also open the bottom of the netbook to "re seat" the wireless module.
CASE LianLi PC V2000 MOBO Maximus V Gene CPU i5-3570k @ 4.5GHz RAM Corsair CMZ8GX3M2A1866C9 (4x4GB) CPU COOLER Corsair H80i SSD Intel C330 Serie 120Gb HDD 2Tb Seagate 5400Rpm PSU Silverstone OP1000 GPU EVGA GTX780 3gb GDDR5 HEADSET Corsair Vengeance 2000 7.1 OS Win 7 Pro 64 bits 😛