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#11
Ash is right, check also to see if you have the gta4Browser.exe and LaunchGTAIV.exe in the DEP (Data Execution Prevention) settings. Sometimes having them in it helps a lot.
Click the start
right click on "Computer/My Computer" select "Properties". Go to "Advanced" and under "Performance" click "Settings". Click "Data Execution Prevention" and select "Turn on DEP for all programs and services except those I select:". Click "Add" and add the following EXE's:
- gta4Browser.exe
- LaunchGTAIV.exe
- gtaEncoder.exe
Reboot your system and try launching the game again.