laptop can't connect wirelessly every couple of days

After I power off and on the router and modem (same power switch), the laptop is able to connect internet again. I have to do this every a couple of days.

My desktop does not have problem with wire connection to router.

I thought it might be my 2.4ghz land phone caused the problem and stopped using it. It didn't help.

Could it be some setting wrong in router config?

Thanks in advance.