i install gta iv and also install patch 1.0.7.0 when i install it and launch game open gta activation i dont have key the game not start so what we do

Did you buy the game?

i dont have key the game not start so what we do

Okay, one of two things. Like the poster above you stated, do you have a legal copy of the game. (You should) If not however, you're pretty much out of luck getting help here.

Two, I had the same problem when I bought a new copy of GTAIV and the access key did not work. If you go to rock* games website, there's a section just for your problem. Some fresh access keys/codes

do not work for PC. (As they stated the codes being mixed up with other codes, In short.) What I suggest you do, is do what I did. Call rock* let them know whats going on, they will then ask you to send an email to them verifying you bought the game and have a legal copy of it. That meaning you have to email them a picture(s) of the following: Your receipt (So be sure you havent thrown it away yet), your game. Both discs if its GTAIV, and the contents that came with it and a picture of your error before and after typing your code/key in. Then it will take them an ungodly time to respond with your new key code after going through the process. Me, I waited atleast 2 weeks unfortunately. So I urge you to go ahead and try that if this is your problem and still cease to activate your online profile, etc.

 

Hopefully this helped you, its exactly what I had to go through sadly.

 

Best of Luck!