sos! well, this problem started at my teacher house. i brought my cpu to my teacher house, to transfer some file through lan. when i tried to connect my cpu to hers, an error pop up says that there's ip conflict. both pc is having the same error. i tried to restart both pc few times, and the same error pop up. however, there the icon on the taskbar that says the shows the connection was on. but, i can't transfer file between the pc. so, i decided to stop there, coz i have no idea how to solve this. then i played some video using divx, and it was jerky....everything was jerky after that....even the movement of the mouse cursor. then i tried to shut down and on again. after the shut down, i was not able to boot the pc. it stuck at the ide drive detection. well, i was so frustrated, and we decided to go out for dinner. after dinner, i returned to my house, my pc was able to boot again. but the only problem was jerky....very jerky....i tried bootvis, uninstalling my antivirus, and some other software...nothing seems to help. i checked the cpu usage....it was 100% even since the moment i booted my pc. the task manager itself was using the 100%...weird huh? then i tried to disable the lan connection which connects to another pc to my room. the cpu usage went down.... i try 2 enable & disable, reboot, reinstall my nic, reinstall my nic driver, and still the same thing...enabling the connection will result in 100% cpu usage. i tried the winsock xp fix, ipconfig /release & /renew - they doesn't seems to work. so now i cannot connect to my room's pc. please help i'm using winxp sp 1, install all the critical updates, runned virus scan using nod 32 & spyware scan using ad-ware, both with the latest update. i have 2 nic - 1 build in & 1 is linksys lne100tx fast erthernet adapter version 4 (LNE 100TX V4) - connection to room pc and 1 more is the Intel® PRO/100 VE Network - connection to asdl modem.