ok, so heres the problem.
I have 2 laptops from 2 seperate offices demonstrating the same symptoms. Their built in nics seem to disconnect/reconnect every 20 seconds. I figured it might be the cable, so I swapped it with one that I know for sure works, and it still disconnected. So I figured the nic might be bad, so I disable the nic and install a USB Nic. Same thing happens. I figure it might be a virus, because in the past ive seen it caused by a virus. I run 3 different virus scans all in safe mode from 3 differnt companys...McAfee, Norton 2004, and Housecalls online scanner. They werent able to find anything. I run 3 different Anti Spyware programs and remove everything, to no avail. The settings are correct, I am the on-sight tech here, and everything is set correctly...so Im stumped, im just about to reformat em. cuz im 99% sure its not hardware related, but some kinda software issue.
Anyway, i thought I would turn here first before I reformat em. Good luck answering this one, its a doozy.