Install GTA IV help by following the official instructions or visiting the game's support page.
Install GTA IV help by following the official instructions or visiting the game's support page.
You encounter this warning during installation, but activating it doesn’t work.
That's incorrect. I'm experiencing the same issue too. I just discarded the disc.
Change compatibility options to Windows 7. Execute as admin? Remove game preferences? Visit the forum page at the provided link.
I put GTA IV on my computer before, it worked fine, but I lost control of the graphics options. After that, I applied two patches and everything stopped working!