Windows 2000

The question again was why would two windows 2000 machines connected by a new Netgear DS-108 hub to a LAN line be kicked off the internet after 10 to 15 minutes of browsing. Furthermore, if I would open up more IE windows it would be kicked off also. We have two windows 2000 server machines connected to their own hub and both are not being used as a server, and also one windows 98 machine that never fails. Surpisingly the two so-called servers have no problem staying on the internet. I hope someone can help!

IT