Windows XP Professional and broadband connectivity

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I hope that someone will be able to help resolve the following problem and that this is the right avenue to raise this matter. I have a client's PC, a Dell Dimension 4600 running MS XP Professional, which will connect to Broadband and remain so but after 8 to 10 minutes but his email client and Internet Explorer will no logner connect although the PC is still connected to Broadband. SP2 has not been installed and no Anti Virus software installed in the event that a Firewall might be the cause of the problem. If I did not know better it looks as if it is Denial of Service through Port 80. I have so far not been able to resolve and would really appreciate some help and guidance to resolve this issue.

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First, I would suggest installing some sort of antivirus program on the subject machine; any brand/any flavor, just put something on and run a full scan with updated definitions/signature files with the machine removed from the network.

If no firewall is installed, install one; do not rely upon WinXP or WinXPSP2 to supply the firewall, as neither has egress (outgoing) protection. There are several good free products out there, such as Sygate (my personal choice), Zone Alarm, Black Ice Defender, and Tiny Personal firewall (there are most assuredly others as well).

With that done, check and see if there is an entry in Device Manager called “1394 Networking”: this is an service which has been known to interfere with network (ie: broadband) connectivity. Adaptec knowledgebase article 7797 describes the issue and has a possible fix, especially as relates to their IEEE 1394 products (the files specifically mentioned are Windows XP native files, not Adaptec’s).

It’s also possible that the network card/subsystem may be failing…

Hope this helps

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