chitchat

I have downloaded the program 1) Second_Life_2-6-0-225006_Setup.exe and 2) Second_Life_2-6-2-225998_Setup.exe (both versions). I tried to install both the versions but I cannot execute the program. What´s the reason that I cannot view the second life program or why doesn´t it start. I need technical help to start using second life. Thanks in advance.