I'm using Lenovo G580 laptop. Facing Wi-Fi related problem in few interval Wi-Fi itself get limited access?

I'm using Lenovo G580 series laptop with OS Windows 8.1 64-bit. From past few days i face some problem related to Wi-Fi. In few interval the Wi-Fi itself become limited and start showing limited access. If I disconnect the Wi-Fi and try to connect it connects but again after certain interval it start showing limited.

I try few thing like i download a fresh Wi-Fi driver from Lenovo support and install it but it didn't work.

Like always, restarting things like your receiver or computer might help, as will checking the Wi-Fi signal from the same are with another device. Otherwise, reinstall the driver or install a different one.

It is not your equipment. It's the Wi-Fi… Something is not functioning right with the router or modem