UPDATE JUNE 4, 2015:-
My ISP provides a Wi-Max (wireless) device which receives the signals and sends it through LAN cable to my laptop. I've been using this device since last 5 years. Today, for a certain reason, my ISP's custom care center replaced the device with a new device. Now, I'm no more facing this issue. So, I think that the problem is in the modem, not in Windows 8.1. I hope that my update will help others.
I'm facing a problem where when I visit a site Google Chrome says to me:-
"This web page is not available"
This happens for many sites. I've searched on Google and have found a fix. If I run the following command of flushing dns caching
then I can load the site. But after few seconds or minutes Google Chrome again gives the same (error?) message. "This web page is not available". I need to run the command again and again and it has now become very irritating. Anyone knows the solution of my problem?
OS: Windows 8.1 Browser: Google Chrome (Version 34.0.1847.131 m)