Dead internet.Urgent comphrehensive hep needed.

[harpoon]

I formatted my HDD last month;since then all is working fine except the internet i.e the computer gets connected to dataone,but I.E(6.0) displays error in opening page(no webpage can be opened),& antivirus cannot update.I have tried also with other browsers but with no help.The entire system was scanned with avast,it found some viruses but deleted them.I also ran a spyware scan but with NIL results.
I reformatted once again but the error continues.I posted a thread last month but no one was able to solve my query,hence my P.C is lying idle for 23 days & I am at my wits end.
My laptop works perfectly with the same internet connection.
I have also scaned with Panda but with no help.
What could be the problem?Can please somebody help?My last post 3 days ago,did not evolve any solution.HELP!!!!
Is this an registry bug?

 

[mod-the-pc]

Could be a problem with DNS. Add BSNL's DNS server ip in your connection's TCP/IP properties dialog and retry.

NB: Get the DNS server ip using ipconfig /all

 

[Choto Cheeta]

well Go to Internet Option =>> there click Connection... now on the DATA one click settings, there make sure u are not configured to use a proxy !! also there fing lan settings... there also make sure u dont have any proxy address input...

Take help frm here

*support.microsoft.com/?kbid=135982