Hello again Dane,

The PC version of GTA 4 is very, very poorly optimised. It was designed for consoles and ported to the PC, and pretty much everyone complains that it runs poorly even on high-spec PC's. See this extract from the Wikipedia article:

"Rockstar has come under fire from Grand Theft Auto communities, Gamespot and other websites, due to the game's abnormally high system requirements, as well as for its poor performance, even on systems that exceed the recommended system requirements by a wide margin."

Short of recoding the game from scratch, there's nothing you can do to fix it.

Skal være up-to-date. og IV krever ikke så mye. hvertfall ikke mer en Metro og andre High-end spill... reinstallerer nå og ser om det hjelper