It looks like you are looking for a solution to fix performance or crashing issues in Grand Theft Auto IV (GTA IV) on PC.
Since you mentioned "Pro Fixer," you might be referring to a specific mod or patch. However, the most widely accepted and effective method to fix GTA IV on modern PCs is a combination of official patches and community fixes.
Here is the best way to get GTA IV running smoothly today: gta iv pro fixer
Anti-Cheat / Online:
NOT compatible with GTA IV Online (GFWL or third-party multiplayer) – will trigger desync or bans. Use only for single-player.
If you want to fix the game manually without downloading a large mod pack, follow these steps: It looks like you are looking for a
Step A: Remove Games for Windows Live (GFWL) GFWL is discontinued and causes the game to crash on startup for many users.
Step B: Downgrade the Game (Steam Version) If you bought the game on Steam, it is likely updated to version 1.0.8.0, which removes certain music and can have performance issues. Many players prefer to downgrade to version 1.0.7.0 for better mod compatibility and performance. Anti-Cheat / Online: NOT compatible with GTA IV
Step C: Optimize Graphics Settings GTA IV is notorious for bad optimization. Even with a powerful PC, you might get low FPS.
| Category | Specific Fixes |
|----------|----------------|
| Mission & Script Bugs | – Fixes "Wrong Island" bug (missions triggering early).
– Fixes Roman's cab not appearing.
– Fixes various phone call softlocks.
– Prevents mission NPCs from getting stuck/failing to spawn. |
| Performance & Crashes | – Reduces random "RESC10" (out of video memory) errors.
– Improves handling of vehicle/pedestrian streaming.
– Fixes crashes when entering/exiting certain interiors. |
| Visual/Graphics | – Restores missing reflections on some vehicles.
– Fixes transparent textures on certain buildings. |
| Save & Loading | – Fixes infinite loading screens on save/load.
– Prevents save corruption in specific story missions. |
| Compatibility | – Adds better handling for modern Windows (10/11).
– Allows running with higher frame rates without breaking physics. |
A pro fixer in GTA IV is more than a skilled driver or a ruthless shooter. They are an operator who:
Niko’s world rewards planning. Missions often have multiple approaches; the player who treats them like complex jobs rather than scripted set-pieces will get the most out of Liberty City.