I have issue where i can download antivirus updates,download torrent files but my webpages are not opening either from IE or Firefox.Diagonising the problem gives the issue as DNS server not responding.I don't know why but my downloads are happening well i just cant surf the internet
Try out namebench. It hunts down the fastest DNS servers available for your computer to use. namebench runs a fair and thorough benchmark using your web browser history, tcpdump output, or standardized datasets in order to provide an individualized recommendation. namebench is completely free and does not modify your system in any way.
I tried pinging the site www.bbc.co.uk but get an error like "Ping could not find the requested host...."
But ipconfig /release and renew don't work i have also tried the OPEN DNS 18.104.22.168 and alternate DNS 22.214.171.124 but they too don't work.My files are downloading fine from torrentz with a good speed.
My OS is Windows 7 ultimate.
Maybe your hosts file is messed up. Check C:\Windows\System32\Drivers\etc\hosts. It's a file with no extension that you can open on notepad, it should contain no entries other than localhost at 127.0.0.1. Anything else may be causing you problems.
What Muri said but in might have other entries if you use spybot. I always go directly to thinking this is malware Run Malwarebytes or superantispyware or spybot or all of them lol. pretty sure this will be the cause if not go with what the other guy said and call ISP.