Hello guys ! I've got a problem with my wireless connection, when I click the wireless icon to view the networks, There are no networks, they just do not appear. So I tried opening network and sharing center to change adapter settings, and there was no wireless network adapter, I installed the drivers(Atheros Wireless Network drivers) and still the same, what should I do?

My Computer
- Computer type
- Laptop
- Computer Manufacturer/Model Number
- Acer Aspire 5750G
- OS
- Windows 7 Ultimate x64 bit
- CPU
- Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz
- Graphics Card(s)
- NVIDIA GeForce GT 540M
- Screen Resolution
- 1366 x 768
- Internet Speed
- ~1.3~ Mega Bytes per Second.
- Browser
- Mozilla Firefox