southpaw3229

I'm using Comcast Workplace for out ISP. We have around 25 workstations and over the past few days each workstation has had internet conncetivity problems. i have to go to each one and click on the lan properties and disable....wait....then enable it again and it works fine. I don't know why it's happening and it happens around 3 times a day on most of the computers. the only think we've done in the past week is plug in a Linsys Wireless Router into one of the Cat 5 jacks in the wall. It's after the modem, firewall and switch, so it shouldn't cause this right???? I called comcast and they say that our connection is perfect and they don't see anyhting over the past couple of days that show any failure. can anyone help me? thanks