If your school is handicapped and has system blocks and crap that blocks about 90% of a computer's capability, start up notepad, and do this.
type this
start winchat.exesave as "whatever.bat"
double click it
file>dial>choose friend
profit
NOTE: only works if all the computers are on the same network. it works with a bunch of other things too, like
start cmd.exewhich opens up command prompt. If your computer closes cmd prompt as if is opened, put pause on a new line after doing stuff after opening cmd prompt