mr_f0x :
In Device Manager > Network adapters ther is no wirless card
Try reloading the driver, starting from Asus support page for your laptop. If that doesn't work, you can try the more generic driver through Realtek's downloads, or see if the Windows updates pick it up. A system restore point might get it back up and running if you have one, even.
You might also want to test things from within Safe Mode. I've seen some malware cause this kind of behavior; if you suddenly get it working within Safe Mode with Networking, then there's a good chance a virus is the problem.