Make sure you have latest updated WiFi driver.
For me updating the Atheros WLAN driver to v10.0.0.225 fixed the problem
I don't know which wireless adapter your laptop has. let me know and I can help you get an updated driver
ASUS G75VW-T1086V
CPU: i7-3610QM 2.30 GHz.
Memory: 16 GB DDR3 1600 Mhz. RAM
Storage: 256 GB LiteOn LAT-256M3S SSD + 1 TB Seagate Momentus 5400 RPM HDD
Graphics: GeForce GTX 670M 3 GB GDDR5 RAM
Screen: 17.3' Full HD LED Screen
OS: Windows 7 Professional (x64)