Enter to the ICQ Installation Wizard through the file you have currently downloaded. The installation wizard will open, and an installation security warning will display. In an answer to that click on the Install Anyway option, and then click on Next.
Select a language and on which drive you want to make the installation. Once installation of the ICQ files begins, an Installation Complete notice will appear, and you will be asked if you want to add another component.
Click Finish to close the installation wizard. ICQ will be added to the programs accessible via the Communicator’s Extras application button.
Select ICQ to open the application and login for the first
time.