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toshiba laptop- can't access internet


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#1 rpmniners

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Posted 17 January 2010 - 10:32 AM

while downloading some music on my laptop, my kids somehow got the malware defense virus. I came to this site to learn how to remove it. After it was removed, I got a "Windows Defender User Interface has stopped working" message. And now the "internt Explorer cannot display web page" message. I cannot activate or reinstall my norton 360. Have windows Vista home basic. Not too computer savvy so any help would be appreciated. Thank You.


Adding to this I also tried system restore to no avail. Diagnosing the problem came up with..."windows found a problem that cannot be repaired automatically".

Edited by Pandy, 17 January 2010 - 11:02 AM.
Moved from Windows Vista ~Pandy


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#2 quietman7

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Posted 18 January 2010 - 03:08 PM

Generally most Internet connectivity problems arise out of corrupt Winsock settings due to the installation of a networking software or Malware infestation.

Try resetting the IP address:
  • Go to Posted Image > Run... and in the open box, type: cmd
  • Press OK or Hit Enter. A dos Window will appear.
  • At the command prompt type or copy/paste:: ipconfig /release
  • Hit Enter.
  • When the prompt comes back, type: ipconfig /renew
  • Hit Enter.
  • Close the command box and and see if that fixes the connection. No reboot needed.
-- XP users can refer to XP ipconfig Tutorial: Step 4
-- Vista users can refer to Vista ipconfig Tutorial: Step 4 and How to Enable Run Command in Vista


If that did not resolve the problem:
  • Go to Posted Image > Run... and in the open box, type: cmd
  • Press OK or Hit Enter.
  • At the command prompt, type or copy/paste: ipconfig /flushdns
  • Hit Enter.
  • You will get a confirmation that the flush was successful.
  • Close the command box.
If the above commands did not resolve the problem, the next thing to try is to reset your network settings and Configure TCP/IP to use DNS.
  • Go to Posted Image > Control Panel, and choose Network Connections.
  • Right-click on your default connection, usually Local Area Connection or Dial-up Connection if you are using Dial-up, and and choose Properties.
  • Double-click on Internet Protocol (TCP/IP) or highlight it and select Properties.
  • Under the General tab, write down any settings in case you should need to change them back.
  • Select the button that says "Obtain an IP address automatically" or make sure the DNS server IP address is the same as provided by your ISP.
  • Select the button that says "Obtain DNS servers automatically".
  • If unknown Preferred or Alternate DNS servers are listed, uncheck the box that says "Use the following DNS server address".
  • Click OK twice to get out of the properties screen and restart your computer. If not prompted to reboot go ahead and reboot manually.
-- Vista users can refer to How to Change TCP/IP settings

CAUTION: It's possible that your ISP (Internet Service Provider) requires specific DNS settings here. Make sure you know if you need these settings or not BEFORE you make any changes or you may lose your Internet connection. If you're sure you do not need a specific DNS address, then you may proceed.


If that still does not help and your using Windows XP SP2 or SP3, log on as an administrator:
  • Go to Posted Image > Run... and in the open box, type: cmd
  • Press OK or Hit Enter. A dos Window will appear.
  • At the command prompt, type or copy/paste: netsh winsock reset
  • Hit Enter.
  • When the program is finished, you will receive the message: "Successfully reset the Winsock Catalog. You must restart the machine in order to complete the reset."
  • Close the command box and reboot your computer.
Note: The netsh winsock reset command resets the Winsock catalog to the default configuration (clean state) and removes all LSPs (Layered Service Providers) previously installed. It is useful if a malformed LSP is installed that results in loss of network packets transmission failure leading to loss of network connectivity. Any previously-installed LSPs will need to be re-installed. Instead of using the netsh winsock command, another option for resetting TCP/IP in XP or Vista, is to use automatic Microsoft Fix it. Click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard. You can save the automatic fix to a USB flash drive or CD, transfer it to the affected computer and then run it.


Finally, if you continue to have connectivity problems, XP users can download a fix from another computer, save to a usb drive and transfer to the infected computer so it can be used. Vista users can refer to:

Edited by quietman7, 18 January 2010 - 03:10 PM.

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