Open the browser and enter in the Address bar: 192.168.1.1, carriage return.
In the pop-up login window, enter the username and password, the default is admin, click OK, enter the wireless router settings interface.
Select "Wireless Settings" in the left setting option, because different router settings will vary, depending on the router settings interface, the operation is similar.
After you select wireless settings, select Wireless security Settings in the subordinate menu that pops up.
You can then see the relevant interface for the pop-up security settings.
At this point, in the security settings of the interface can see the wireless router password, that is, the interface of the PSK password, you can modify it or remember to log back to the wireless network cable on it.
Re-log on to the wireless network with the recovered password or modified password to see if you can log on normally.