IRC (Internet Relay Chat) client software is provided by many Internet Service Providers. If not, you can download the latest versions of the IRC client software for your machine:

FTP sites are :

ftp.undernet.org/pub/irc/clients/windows/
cs-ftp.bu.edu/irc/clients/pc/windows/
papa.indstate.edu/winsock-l/winirc/
ftp.winsite.com/pub/pc/win3/winsock/

You can also visit the programs' World Wide Web pages to download the clients: