Web Browsers stop working after awhile but Skype/uTorrent still workin

Hi last night I had the most frustrating and odd problem..

My browsers stop loading ANYTHING after awhile.. It just gives me a blank page (Firefox), while on chrome it gave me 'Error 104 (net::ERR_CONNECTION_FAILED): The attempt to connect to the server failed'

But here's the catch, I didn't get disconnected from either my Skype or utorrent. Even the stuff I was downloading using my Orbit downloader ARE still downloading!

My 'Network' shows that I am still connected to my wifi and shows NO sign of error.

The only way for me to 'fix' it is by restarting my laptop. But it's not even permanent.
I tried clear cache/cookies trick. didn't work, the Internet lan option too as well.

Hi there, download this attached file. Right click on it and click on Run as Admin.
Your computer will reboot. See it this helps.
flush.bat

It works whenever I face any network issues. :)

Run a Pingtest.net - The Global Broadband Quality Test and check how is your line quality.
Try a different computer to rule out the fault with your computer.

Can you check if there's an update available for your network adaptor?
Open Windows Update and click on Check for Updates. If a new driver is available, that should certainly fix the issue.