I maintain a network of six computers. All have Windows XP Professional. We have a DSL line which runs into a Netgear FVS318 router. Four of my computers are having no problems. Two of my computers cannot get onto the Internet. However, they can retrieve their e-mail and I can ping other computers that are part of this network, outside addresses (like www.yahoo.com) and the router. In event viewer on one machine I get Error 1002, the ip address lease 192.168.0.7 for the network card with network address xxxxxxxx has been denied by the dhcp server 192.168.0.1 (The dhcp server sent a dhcpnack message). And on the other machine I only get a warning on event viewer for Error 1003. I have made sure I have the last firmware for my router. I did a system restore to the beginning of this month and the computers got on the Internet for that day. The next day, same problem all over again. I have downloaded through another computer Microsoft Antispyware and Spy Sweeper. Both have not really found anything and have no fixed the problem. There are no conflicts in event viewer. I'm ready to wipe their harddrives and reinstall. I cannot find a minidump directory or any type of files like that. Also if I boot those two machines in safe mode with networking I can get out on the Internet. Any ideas or suggestions would be much appreciated.