It could be a problem with the TCP/IP stack, or perhaps the DNS lookup is getting reset, but I can't imagine that is happening. Drop me a PM with your number and we can try to figure it out.
Next time you are online...surf around and wait for the error to occur, keep your computer on and then do the following.
1. Click Start, and then click run (usually located in the second column of the start menu).
2. This will launch a small window, in the text line type cmd and then press enter.
3. This should bring up an old DOS style window. The curser should be flashing next to a menu...usually "Documents and Settings Tommy>" Here type the following, ping
www.xmission.com and then press enter. You should get a little report that says "Pinging
www.xmission.com [198.60.22.4] with 32 bytes of data" It should then get a reply, 4 times from the above IP address. If you get a report that says "ping request could not find host" then it is probably a problem with your computer TCP/IP stack or DNS lookup. If it finds the IP address (the 198.60.22.4 number) but times out with the ping request, then it is a problem with your modem, or perhaps another setting.
4. Restart your computer and while everything is working re-try the ping command in step 3.
I know this won't solve the problem, but it might help us get to the bottom of it.
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