Limited internet access with windows 7

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Ella123

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Joined
Jan 16, 2013
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1
Have windows 7 os and have a problem connecting to certain websites e.g. google, hotmail etc but otherwise can surf the net. Tried diagnosing problem and the message came up "your dns server might be unavailable." I have tried troubleshooting from online advice - resetting the router, restarting everything, tried resetting the dns cache and changing the ip address but that just lead to an ip conflict. Any advice would be appreciated.
 

etaf

Wayne
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Joined
Oct 2, 2003
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65,454
this maybe a malware issue or maybe a DNS issue
but first check hosts file - see below

next try google open dns

Checking the Host file

  • Open Notepad - Start> Programs> Accessories> and right click on Notepad select "Run as Administrator" to open a notepad
  • Now goto 'File' > 'Open' and browse to the HOSTS file - which will be located in C:\WINDOWS\system32\drivers\etc. - you may need to change the drop down box next to the file name:box from Text Documents (*.txt) to ALL Files (*.*)
  • The file should look like the info at the bottom of this post

    Now all you need to do is copy and paste those results into a reply here
    to do that:
    From the notepad menu - choose Edit - Select all
    all the text will now be highlighted
    Next
    From the notepad menu - choose Edit - Copy

    Now go back to the forum - goto the reply and then right click in the reply box and paste the results.
    The results from the notepad should now appear in the forum reply.

  • Once you are finished, go up to 'File' and click 'Save'. Make sure to change the Save as Type: box to All files.
    Otherwise, Notepad may add a .txt extension to the file which will keep it from working. If you don't have your system set to show extensions, it's easy to miss that.

------------------------------------------------------------------------

------------------------------------------------------------------------


# Copyright (c) 1993-2009 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

# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost

------------------------------------------------------------------------

------------------------------------------------------------------------


------------------------------------------------------------------------


Google public DNS
Note using google public DNS servers from outside the US may actually slow performace - so use the following as a test to identify DNS issues - if these resolve the issues , then we need to investigate further to optimise the use of DNS


Google public DNS
http://code.google.com/speed/public-dns/

Theres also a link on how to setup those DNS IP address up on a PC
http://code.google.com/speed/public-dns/docs/using.html

How to set XP here
http://techie-buzz.com/how-to/google-public-dns-on-win7-and-winxp.html

Then once you have set up those DNS entries

Flush & register DNS

Hold the Windows key and press R, then type CMD then press Enter to open a command prompt box (A new dialogue box - black with white font, will appear on screen ):
In the command prompt window that opens, type the following commands:

Ipconfig/flushdns
ipconfig/registerdns


If you receive the message
The requested operation requires elevation.
Then please open the command prompt as administrator
Start> All Programs> Accessories and then right click on Command Prompt, select "Run as Administrator" to open a command prompt.

now type the command again
 
Joined
Jan 14, 2013
Messages
137
Hi,

Please have the IP address and DNS server address set to "Obtain Automatically"
Then reply back with ipconfig result from the command prompt.
 
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