Ever since the release of GTA 4 a lot of people complained about the game not being optimized so it could be the game.
Exactly, if he checks and monitors his rig and doesn't find anything wrong then it's he game itself.Well there are plenty of reasons why it may happen, but I was also unaware that Steam had the ongoing issue. I should keep up on these things more I suppose.
There is a very high probability that it's the game, not his system, nice name btw.They first thing you should try when an issue like this pops up is to check to see if your graphics card drivers are up to date. This will often be a quick and easy fix for the majority of stuttering issues. If that doesn't work, it may be worth reverting to an older build of the game. Sadly, GTA IV is extremely poorly optimized for PC. It's a mess trying to get it running on a modern rig with a recent version of Windows.