I have a Gateway E-1500 with a fresh install of OS and new MB (MS-7173) with on board NIC (Realtek 8139).
It is running XP Pro 2.8GHz processor and 1GB RAM, Office Suite, and some proprietery apps.
The system started up, was able to connect to corporate net, when you reboot the system cannot reconnect to the network and in device manager the exclamation point is listed on the NIC and it states no drivers exist. If you uninstall the NIC reboot, it locates and reinstalls the NIC and finds the drivers. All drivers are up to date and all updates for programs and OS are complete.
I have ruled out Spyware, viruses and the like since this is a fresh install. XP firewall and Symantec firewalls are disabled as we use a HW firewall in the server room. secodary PCI NIC
seemed stable but boss wants to use onboard since it is a new board.
I have seen similar posts with only work arounds or replacing the NIC, this is not an option as we spent $ on the new mainboards.
Other E-1500's with the same configuration are fine.