No need to get rude here.. Not everybody know english aswell as, I suppose, you do. I understand that it is annoying that you feel he is ignoring the most important question, and aint reading stickies but for god sake, just chillax.
On topic: You said it wouldn't patch. Do you have a legit copy of GTA IV?
You may wanna try lower your graphics settings and update video drivers.
Edit: If you dont know how to find your computer specs do following:
1. Open start menu.
2. Right click computer and click properties.
- You will see something like this (Dont kill me, but this is my laptop, not desktop computer!):
I assume from own experience, where it says processor, it also tells you what graphics card you got.
And if you are using a laptop, I guess there is a sticker on it to the lower right/left where it says something about the specs.