sometimes when windows crashes for some reason it resets your IP's
in windows98 the solution was easy you go to Start Run and typed in
winipcfg and in the box that appears choose >> More Info then select your Ethernet Adapter from the drop down list, click on [Release All]
wait around 5 seconds and click [Renew All]..assuming your router is running a DHCP server...wich it should be, your Internal IP numbers should resort to 192.168.1.xxx
and you would then be able to access
http://192.168.1.1now XP seems a different kettle of fish <moan groan> i hate the thing, probably 1 of the reasons i moved to linux (end of rant) btw that's a personal opinion i'm not looking to start a distro/os war

Anyway as far as i can recall you should look in Network connections window and try to refresh the DHCP lease for your adapter, and hopefully after that you should then be able to access
http://192.168.1.1or try to open up a Dos box..or Start run cmd or cmd.exe and type in ipconfig /renew this might do it.
ScoT
#mIRC Undernet