Scroll down a bit.
Look for the similar label on the outside of your computer.
Quote the specific Model number
Quote the Product number (P/N)
Some laptops and netbooks have a non-standard button, it may be on the keyboard, or switch that toggles the wireless adapter's broadcast on/off - you may have pressed that or moved that un-intentionally and toggled that OFF.
The computer can't connect to anything wirelessly when that wireless broadcast is OFF.
If the wireless broadcast can be toggled on/off by whatever means, there's probably an led on the computer that indicates that by lighting up when that's ON.
Your laptop or netbook may be using a proprietary wireless settings utility that came with the drivers for the wireless adapter, or the Wireless Zero settings utility that's built into Windows - Windows can only use one or the other for a particular wireless adapter.
If Windows is using a proprietary wireless settings utility that came with the drivers for the wireless adapter, the Wireless Zero settings utility in Windows is disabled, and there is some other wireless settings utility listed under All Programs.