Please Help: Issue with Atheros WiFi Connection

I have Acer Aspire V5-122P-0468 laptop and it uses Atheros Wireless Adapter. I confirmed I have the latest driver version 10.0.0.245. The issue is Wi-Fi connection drops unexpectedly. It says the page cannot be displayed, fix your connection. And when I try to troubleshoot the problem, sometimes tells me that I need to unplug my broadband modem and my router and then plug them back in to correct the issue. But I know that the issue is neither with my modem or router because I have other laptops and devices (smart phone, tv, bluray with wi-fi connections) and they work just fine. They don't experience the same issue as my acer laptop. Sometimes when I troubleshoot the issue, it checks for errors and at the end it says "no error found" and then magically the website comes up. I know there is something going on with the wireless adapter/ wi-fi connection. Since I have the latest driver, I am at a loss what else could be going on. Any idea would be appreciated.