GTA IV running epic slow

Hello,

I was wondering if you guys could help me out with this.
I searched allot but they dont help for me.

Specs,

Item	Value	
OS Name	Microsoft Windows 7 Ultimate	
Version	6.1.7601 Service Pack 1 Build 7601	
OS Manufacturer	Microsoft Corporation		
System Manufacturer	To Be Filled By O.E.M.	
System Model	To Be Filled By O.E.M.	
System Type	x64-based PC	
Processor	Intel(R) Celeron(R) CPU        E3300  @ 2.50GHz, 2493 Mhz, 2 Core(s), 2 Logical Processor(s)	
BIOS Version/Date	American Megatrends Inc. P2.10, 5/16/2012	
SMBIOS Version	2.4	
Hardware Abstraction Layer	Version = "6.1.7601.17514"	
Installed Physical Memory (RAM)	4.00 GB	
Total Physical Memory	4.00 GB	
Available Physical Memory	1.77 GB	
Total Virtual Memory	8.00 GB	
Available Virtual Memory	5.96 GB	
Page File Space	4.00 GB	
Page File	C:\pagefile.sys	
AMD Radeon HD5570
ASROCK G31M-S

GAME,

GTAIV Update 1070

Even with adding commandline.txt with those commands,

-norestriction
-nomemrestrict
-availablevidmem "1.1"
-percentvidmem "100"
-fullscreen
-safemode

-The game runs ugly.

AMD CCC Specs,

Anti-Aliasing Mode: Use application settings
Anti-Aliasing Samples: Use application settings
Filter: Box
Anti-Aliasing Method: Multisampling
Morphological Filtering: Off

Anisotropic Filtering Mode: Use application settings
Anisotropic Filtering Level: Use application settings
Texture Filtering Quality: Performance
Surface Format Optimization: Off

Wait for Vertical Refresh: Off, unless application specifies
OpenGL Triple Buffering: Off
Tessellation Mode: AMD optimized
Maximum Tessellation Level: AMD optimized

I Hope you guys could help me out. iam kind of mad because the game runs smooter before and i dont know why its running dang slow now. Even my grandma is running faster than the game -_-