-what is this!?!?!-

when you log onto java chat you will now see your name, computers name and ip.

do not freak out!  yahoo added that so users would know that yahoo knows their ip address (and name on account ).. it doesn't get broadcast. ONLY YOU SEE IT....basically, someone thought that if yahoo put the IP addy up there, then users would see it, and maybe not trade child porn or be abusive. yahoo already had it. they are just letting folks know they know. you cant stop yahoo from knowing who you are once you log in. but you can change what you see. check the privacy policy for more details.

change your name in that display~

go to account info....on the left side, under Address/Contact Information, click edit, and remove  or change the name there......you should see whatever id you log in show then. 

change  your comps name in  that display~

click start >  then settings >  then control panel > (some may need to click system here)  then network >  then identification >  ( some may need to click more here) then just change what you see in the box for computer name

you can not change your ip, that is your computers unique address on the net  . for dial up users it changes every time you reboot. but as i said, only you see it, and yahoo only cares if you do something bad. you're not gonna be bad are you?