The reason why the Win7 system can not find the wireless signal after reinstalling and the solution

notebook computer always has such problems in the process of use, sometimes it is serious to reinstall the system, but there may be other problems after reloading. A common phenomenon is that we can't search for wireless signals. Let's take the Win7 system as an example to analyze the causes and countermeasures. First, after reinstalling the wireless network card driver is not installed: wireless connection is indispensable to the wireless network card, and the driver is the most important for the wireless network card, if there is no installation or installation of the incorrect driver, then it is impossible to use the network. Solution: 1. According to the model of your notebook, go to the official website to download the wireless network card driver belonging to the win7 system and install it. 2. If you can't find it, you can use the software such as “Driver Wizard” to detect and install the driver. Second, you may have turned off the wireless network card in the notebook is generally equipped with the function of turning off/on the wireless network reception, so when the wireless cannot be searched, you can try to find the wireless switch to check if it is turned on. 1. Some notebooks have physical switches that can be found on the side or panel of the notebook. 2. Some notebooks use function keys, such as FN+F, to turn them on or off. The function keys in the top row (find the wireless logo) . It is very common to have such problems after the reloading of the notebook. Most of them are caused by the fact that the driver is not installed or the wireless is not turned on. The friends you encounter may wish to try the small series.