Limited laptop with Wi-Fi?

I wanted to play with my mother's laptop at home, I took it with me but when I wanted to connect to my Wi-Fi it worked but it says limited. Now I'm back to my mother with it & now there's also a limited amount of time on her Wi-Fi (which always worked). Means I don't have any internet on my laptop anymore & don't know how to change that.

Restart the router.

Sounds like an incorrectly assigned IP address, or a DHCP problem.

In other words, the notebook's IP is on a different network from that of the router.

I've already tried. I restarted router & laptop

I just notice that my mother's Wi-Fi is limited, the internet works. So it's just not possible with my Wi-Fi