In this case, the power saving function of the network card is enabled. Take Win7 as an example, right click the computer on the desktop -- Properties -- Device Manager, double-click the English name of the network card, click Power Management in the newly opened window, and then remove the option of "running the system to turn off this device to save power", and then confirm
It is estimated that either the wireless is not good, turn on the router after turning off, or change the wireless route. If the router is OK, the laptop cannot be connected after restarting. It may be that there is a problem with the software or hardware of the wireless network card. First, the next driver wizard will check it or try the next software again. I used to be that the wireless connection is good after eating, but it will not be connected after eating,Later, I downloaded a new software. However, you can see that there is a problem with the wireless connection. There is an exclamation point. Let's take a look at the router
There are the following possibilities: 1. Currently, WIFI is not connected to the network; 2. WIFI crashes; 3. The superior device of WIFI crashes, such as Modem; 4. The currently assigned or assigned IP address of the computer is incorrect (including gateway and DNS); 5. The network is limited, such as parent control of routing, firewall of computer, etc. terms of settlement: 1. Check whether the current WIFI has access to the network;If there is no access, access to the network or replace the WIFI connected to the network; 2. The WIFI equipment is powered on and restarted after a certain period of time; 3. Check the upper level equipment of WIFI to see if it works normally;If not, it must be powered off for a certain time and then turned on again; 4. Check the current IP, gateway and DNS of the computer to see if they are correct; 5. Check whether the current WIFI connection is restricted, and check the computer firewall (including the firewall provided by the system and the third-party firewall) to see whether it prohibits the computer from accessing the network.
