However, I must add my voice to previous speakers, that you often would prefer to carry back the envelope and its contents to load during installation.
So, for those who like me want to play the game on your home computer and deliver no multiplayer games with other, here the advice on how to install the game without logging the same for all sorts of other programs and vollzuballern his computer:
First, install the game, there is a program called "Rockstar Games Social Club" mandatory mitistalliert. If the game is installed, you should use the latest patch googling (eg "GTAIV_1.0.6.0_Patch" or higher) and download free. Install the patch, hereby the game will not only brought up to date, but also the annoying "Rockstar Games Social Club" uninstalled, which can now no longer needed for the rest of the game. It is necessary that a program called - is installed, which is pretty long can search on the DVD or is much faster in Google "Games for Windows LIVE". This program is also installed, it is only important that it is installed on the computer, you need not to register there !!! Now you can start the game. When you start a new game, then you will be reminded at the beginning because you are not logged on to Windows-LIVE and therefore can not write Scores. If you do not click through to the next screen, the same as wild, but carefully read the text, so you can, after you have runtergescrollt, can create a marked in blue link "Offline account". Plan Click to enter a name and ... Let The Games Begin !!!!! : D