I am connected wirelessly to broadband with an Origo router/modem. Since a major crash needing a new hard drive I find broadband randomly stops after a while of non use. I have eliminated the router as XP connects after a computer restart. I have moved the router to the phone box to check the cable is ok and I have changed the filter. The wireless card is showing a good connection and signal strength. This I think only leaves XP+SP2. I use Zonealarm if this helps.
Any ideas what in Windows could be causing the shutdown?
Any help gratefully received.
Peter.

To eliminate Zone Alarm as the issue I would turn it off & turn the SP2 wall on.
Does this change anything?

Also I see this:

What you need to do is go under Administrative Tools in your control panel.
Left click on services. Right click DNS client on the right side. Click
stop. Then right click again and go under properties and disable the DNS
client.


Under network connections in the control panel go to your local area network
and under properties click on the ICP/TC protocol your and properties. You
should have clicked Obtain IP address automatically and Obtain DNS server
address automatically. Also under the local area network properties make
sure your check box for file and printer sharing is off unless you truly
want to share your computer info with everyone).


This will keep you from having to work around with DNS numbers. When I did
this XP kept refinding my regular modem but was never able to find the
necessary files for it. What I had to do is go under the phone and modem
settings and delete my modem and reboot. It allows windows XP to correctly
identify your modem and reload it.


I hope all of this makes sense to you. My internet connection works
wonderfully now. I got this information about the DNS server from local area
network from ATTBI themselves after 9 frustrating hours of being on the
phone at different times because I could not get anything else to fix the
problem.

& Also:

http://www.tweakxp.com/display.aspx?id=421

Hope this helps.

Will give it a go, won't know for some time as the shut-off is random.
Thanks
Peter.

Have found that it probably was the Zonealarm conflicting with the XP+sp2. No probs when disabled. Have uninstalled and reinstalled Nortons. (No groans at the back please)
It works for me.