Low fps in cod4

Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7600) (7600.win7_gdr.101026-1503)
Language: English (Regional Setting: English)
System Manufacturer: HP-Pavilion
System Model: FZ122AA-ABU a6635uk
BIOS: BIOS Date: 06/23/08 16:36:25 Ver: 5.24
Processor: AMD Phenom(tm) 8550 Triple-Core Processor (3 CPUs), ~2.2GHz
Memory: 4096MB RAM
Available OS Memory: 4096MB RAM
Page File: 2243MB used, 5945MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11


Card name: NVIDIA GeForce 9300 GE
Manufacturer: NVIDIA
Chip type: GeForce 9300 GE

With that card I would just replace it as a new cooler for it will cost over half the price of a better card

  i think it would be better for you to just get a new card, the one that you are using is kinda old. S
ince you said your not really good with computers, you better not open your cans and try to change the gpu's fan, you might break it. But if you think you can, go for it!