I am running Windows XP. The system began taking an unusually long time to boot and when I do an IPCONFIG/Renew it takes 65 seconds versus 5 seconds on other computers connected to the same router. The system event log shows Event ID 1001 about every 5-8 minutes and when I am using VPN to connect to work I lose my connection often. I suspect the long boot time is because it hangs waiting for the network connection to get connected.
Event ID 1001 is "Your computer was not assigned an address from the network" and it says DHCP.
This began happening around the time when I upgraded my router to a Linksys Wireless-G router model WRT54G but it is unclear that the router change was a cause. I suspected the router so I went back to my old one but I still had the problem. I have two other XP computers which do NOT exhibit this problem. Also, all computers are hard-wired to the router, not wireless, and I tried swapping the ports, rebooting router, cable modem, PC numerous times. Because other computers have no problem I infer the problem is with my computer and not the router.
Once the network connects it seems to work well browsing the internet or retrieving email but my big problem is the VPN keeps getting disconnected. I suspect the momentary times when the event log says the dchp connection cannot get an address is when the VPN gets lost.