The WiFi of the computer connected to the wireless router is very card, and the wired connection is normal, from here you can first determine that the wireless router is not a problem. In this case, it can be determined that the card is from the WiFi network itself, and the reason for the WiFi card is analyzed:
1. Connect WiFi through multiple devices first, and test whether the network has card problems after connecting to the WiFi.
2, if there is, then there should be a problem with the WiFi signal transmission of the router, or there is a source of interference nearby.
3, if the connection of other devices does not exist this card problem, then from their own computer system, wireless card and other factors to analyze the specific reasons.