Mitt GTA IV crashar

När jag går inte på GTA IV på multiplayer så crashar jag hela tiden. Varför? kan jag fixa de? hur?

Operating System: Windows 8.1 Pro 64-bit (6.3, Build 9600) (9600.winblue_gdr.131030-1505)
Language: Swedish (Regional Setting: Swedish)
System Manufacturer: ASUS
System Model: All Series
BIOS: BIOS Date: 05/17/13 19:10:02 Ver: 10.07
Processor: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz (4 CPUs), ~3.4GHz
Memory: 8192MB RAM
Available OS Memory: 8130MB RAM
Card name: AMD Radeon HD 7800 Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6819)
DAC type: Internal DAC(400MHz)
Device Type: Full Device

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