I have a Linksys WRT54GS2 router, a PC (Windows XP) and a laptop (Windows 7 Ultimate 32 bit).
I have been using this router for 3 months. I was able to use the internet on both devices simultaneously until now. But suddenly since yesterday it only works for one device at a time, not both.
If I connect to the router then I can access the internet only from the laptop. To use the internet from the PC, I have to power off the router, type in run "netsh int ip reset resetlog.txt", and restart the PC. But as the router is off, the internet is inaccessible on the laptop.
While router is on, the PC shows limited or no connectivity.
I tried reseting the router 2-3 times.
On the laptop it sometimes shows "IP address conflict has been detected", even though the IP addresses of the devices were not the same. The IP address of the PC shows 169.X.X.X (when the router is on), whereas the ISP's IP addresses start with 124.X.X.X.
I tried making the PC's IP address static. It shows the LAN symbol as connected, but still the internet cannot be accessed.
I am not even able to view the router's configuration. None of the addresses 192.168.1.0 , 192.168.1.1, 192.168.0.1, or 192.168.0.0 work.
Is there anything I have to change in my configuration to be able to use the internet on both devices? (I have not make any changes in configuration in the last 3 months.)