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Can the XP machines ping out? &nbsp;Trying pinging <a href="http://www.yahoo.com" rel="ugc">www.yahoo.com</a>, if that times out then maybe it;s a DNS issue. &nbsp;In which ping 98.138.253.109
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Can the XP machines ping out?  Trying pinging www.yahoo.com [http://www.yahoo.com], if that times out then maybe it;s a DNS issue.  In which ping 98.138.253.109

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Its one machine or more?<br />
Did you try virus remove software?<br />
<br />
Try follow this article and check for viruses<br />
<br />
<a href="https://www.experts-exchange.com/Software/Internet_Email/Anti_Spyware/A_5124-Stop-the-Bleeding-First-Aid-for-Malware.html" rel="ugc">https://www.experts-exchange.com/Software/Internet_Email/Anti_Spyware/A_5124-Stop-the-Bleeding-First-Aid-for-Malware.html</a><br />
<br />
<br />
I would also suggest running Combofix<br />
<br />
<a href="http://www.bleepingcomputer.com/download/combofix/dl/12/" rel="ugc">http://www.bleepingcomputer.com/download/combofix/dl/12/</a>
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Its one machine or more?
Did you try virus remove software?

Try follow this article and check for viruses

https://www.experts-exchange.com/Software/Internet_Email/Anti_Spyware/A_5124-Stop-the-Bleeding-First-Aid-for-Malware.html [https://www.experts-exchange.com/Software/Internet_Email/Anti_Spyware/A_5124-Stop-the-Bleeding-First-Aid-for-Malware.html]


I would also suggest running Combofix

http://www.bleepingcomputer.com/download/combofix/dl/12/ [http://www.bleepingcomputer.com/download/combofix/dl/12/]

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I have found the Solution by my own way
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On my network, Only windows xp machine cannot brower the internet other all function are working. i have check the Networking connection. Dns , Dhcp, Proxy Server all other working fine. Even Windows 7 Machine are working fine. Suddenly yestersday 3:00pm, Browering was very slow and Now its not working. I have reboot the switch, Connection test to other network change the port. But still the same. I think only windows xp mahine have this issue. I have remove the network cable and But my Laptop on the same port its working becasue my laptop is windows 7. If one machine can understand, But all of sudden 10-15 machine have same problem.
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On my network, Only windows xp machine cannot brower the internet other all function are working. i have check the Networking connection. Dns , Dhcp, Proxy Server all other working fine. Even Windows 7 Machine are working fine. Suddenly yestersday 3:00pm, Browering was very slow and Now its not working. I have reboot the switch, Connection test to other network change the port. But still the same. I think only windows xp mahine have this issue. I have remove the network cable and But my Laptop on the same port its working becasue my laptop is windows 7. If one machine can understand, But all of sudden 10-15 machine have same problem.

Microsoft Windows xp

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.