I use the wireless router from TP-Link.
My internet connection was working fine, but the problem started a few days ago. After getting the problem, I plugged in and unplugged several times and also restarted the router. But still the problem occurred. Then started looking online and found this post . And this article recommended updating the driver. And I'm so glad that the problem was resolved after updating the driver. Nevertheless, thank you Max for your support. Many Thanks.