Vivendi Universal Games would like to notify you of two important updates regarding the product installation for Half-Life 2. The issues identified below are easily addressed. 1. Half-Life 2 - CD Installation error when Counter-strike: Source is not selected The following has been identified as a known issue with Half-Life 2 Standard Edition (not Collector's or European DVD editions): Problem: If during the initial installation process the option to install "Counter-strike: Source" is NOT selected, an error may occur during installation. The message will be: cabinet file error, fatal disk error, or something similar. Solution: Cancel the current installation process and reinstall the game from the beginning, starting with Disk #1. Make certain to select the option to install both Half-Life 2 and Counter-strike: Source. Note: If you prefer not to retain the Counter-strike: Source program on your system AFTER INSTALLATION, you can remove it using the following procedure: After HL2 has been successfully installed, open up the Steam client. Select the Play Games list RIGHT click on Counter-strike: Source and select Properties Select "Delete Local Content." 2. Product Authentication Delay When Installing Half-Life 2 Some consumers may experience delays in authenticating Half-Life 2 during the installation process. This is due to the high volume of consumers who have purchased Half-Life 2 and are installing the game, which is causing high traffic on the Steam authentication servers. Please inform any Half-Life 2 customers that encounter this situation to keep trying, as this is a temporary delay. ** For further information, please visit the Half Life 2 Support Knowledge Base **