Why does my internet stop working?

Using a laptop, my internet works but it stops even the WIFI is still working its just the laptop I have to restart all the time...

There might be the problem in the WIFI router, here Router works and shows signals correctly but if you try to connect to Internet it can't.

Do one thing you need to hard reset the router, There will be a Reset button on the side of the router and find it and just reset with a Pin. It resets and configure your router once and set WIFI passkey and router login password and try to connect.

If the problem persists, you need to update the firmware of the router and once check whether the service provider providing the firmware for router or not. If you want to configure the router once refer router manual for detailed steps and procedure.

If they didn't provide the router firmware upgrade, once contact the service centre may some problem in the router.