On a Windows 2000 PC, I did a "ipconfig /release" to disconnect it from the network. After about 6 hours, I checked it again and it was still disconnected. But then about 17 hours after that, I checked it again and it had renewed the IP address and was back on the network. I never did a "ipconfig /renew", so is Windows supposed to renew the IP address automatically some time after a "ipconfig /release"?
Or could there be some malware on this computer that detected it was off the network and renewed the IP address? (My ISP emailed me saying it detected malware on one of our computers so I am trying to figure out which computer it is.)