Yahoo booters are softwares that use packet codings to send the victim`s computer using yahoo messenger, these pack codes contain some inforemation and codes that computer can not understand, so computer gets hanged or slowed down by proccessing these packets, there r lots of diffrent kinds of packets created by programmers to boot yahoo users in different ays, like disconnecting them from yahoo messenger and internet, or hanging their pcs, or closing their yahoo messenger or sending them thousendes of im messages from diffrent yahoo ids, u can see example of yahoo bootrers at the website below, u can evend ownlaod n use them as they r free http://freewebtown.com/darfun/ http://www.darfun.net.tc