I don't remember the last time a PC game tortured me like this one did. Yes, I knew the game was buggy as hell, and yes, I knew that the damn thing would eat up more system resources than Crysis . For some reason, I didn't come across any bitching online about the game's preposterous installation process. The game takes about forty-five minutes to install, provided you dedicate that time to clicking on the million "next" and "I agree" buttons screen, and change the DVD (yes, it's a double-DVD game) promptly. So don't expect this game to install itself if you decide to "achieve other things" during said process.
During the installation, you are informed that GTA IV requires, not just GTA IV to be installed in order to work, but other things as well, as you can see (above) and (below). It saddens me to see that Rockstar is in cahoots with M$. It needs meaningful things like GFW, SP3, and er... IE. There's more fun to be had in setting up your GFW Live account and your Rockstar Games Social Club account. Yes, you need both of them if you want play online.
A few thousand clicks, a couple of registrations and a few updates later, you'll be good to go! Yay! Just two hours after inserting the first disc into your drive! Of course, you can choose to bypass the setting-up-of-accounts process if you're going to play offline. Of course, then you'd be a n00b.
So, there you have it, the prestigious "Most Tedious Installation" Award goes to GTA IV, not just for pwning the end-user, but also for making EA look like Mother Teresa.