@mrmgoo ,hello, it is important to perform these steps, to keep your router safe: reset the access point / AP, router / to factory settings.
2.Deactivate the WPS option from your router settings.
3.Change the default password to a strong password, other than WEP - a WPA 2 -PSK would be a good option.
I think you won't have a problem with this. Greetings.