SysChat - unable to access some websites

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unable to access some websites

hi,
i have a broadband connection from BSNL(Bangalore, India).i am unable to access some websites. for instance when i try to connect to www.dataone.in(which is BSNL's webmail) it fails.however, iam able to access the site from another computer.iam also unable to access 1or 2 other websites.there is no problem accessing other sites.i have vista ultimate & use IE7.
have same problem with firefox
please help.
ramkumar

Check your host file in that computer (may be the ip-address for that site may be hard coded in your host file.)

thanx for your prompt reply.but since iam not very technically well versed with trouble shhoting i would like to request you for detailed instructions please!!!
thanx a zillion in advance,
ramkumar

Search for file Hosts

Usually Hosts file is located in this folder

C:\WINDOWS\system32\drivers\etc

Open it with notepad

Sample host file looks like this

Quote:

# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host

127.0.0.1 localhost

Delete any thing below this line
127.0.0.1 localhost
and save this file

This could be one of the many problems, Also check for any spyware on your computer by installing anti-spyware programs here are some of them.
Antispyware

tried editing hosts file with what u suggested.
also cleaned with windows defender(got a message saying succeeded in cleaning "SettingsModifier:win32/PossibleHostsFileHijack").
but still same problem.any more suggestions pleeeeeeeeeeease.
ramkumar