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I've recently had to fix a Toshiba Satellite L300 1YA notebook , running the shitty Windows Vista operating system.
For some reason suddenly the Net Link 5100 Wi-FI Network Adapter of the laptop mysteriously disappeared.
The led indicating the device is enabled was blinking the driver showed properly installed in Windows -> System and everything.
Even though that the wireless network scanning in the notebook was not working.
In networking in System there were two lines showing up with excalammation mark "!".
To fix the mess it took me 3.5 hours. I tried many things first logical thing I tried was reinstalling the driver with the latest available from Intel's website. Anyways this doesn't helped so I was about to think about other solutions.
What made thinks even worse was that the Vista installed was in Chineese!, yes you red this correctly chineese. You cannot imagine what a hell it is to deal with Windows whose language pack was Chineese …
The Vista had installed also the Chineese antivirus program Rising which also provided the system with some weird firewall and this made the dealing with the problem even more complicated.
After many tries I finally completely removed the wireless driver on the system and reinstalled it with the latest version from Intel's website.
Thanksfully after a couple of reboots and going into save mode the Intel Net Link 5100 started working again by itself?!
Well you know how things goes with Windows, you never know what will happen next.
Maybe a lot of notebooks suffer the same weird issue with Wireless Wi-Fi adapter suddenly stopping to work.
So now you know the solution, remove the driver install it again, restart and it should be working again.
Hope this quick and dirty article will save somebody an hours of time to figure it out …