Game visual problem

[Smilez_007]

To start off im not too knowledgeable on computers just the basics. Now for the problem. When i play games online (from a wide range of websites) and play my own games it will start off fine then the game will get slower over time. After a couple of minutes of that the game will go back to normal for a couple of minutes, then it wil start slowing down again. I tried defrag, got the most update DirectX, cleaned registry. Ill put up my system information and compare it to Warcraft3 (going to get WoW when i get more RAM and fix this problem). Please help me out.

Warcraft
Minimum System Requirements:
400 MHz Pentium II or equivalent (600 MHz recommended)
128 MB of RAM (256 MB recommended)
8 MB 3D video card (TNT, i810, Voodoo 3, Rage 128 equivalent or better) with DirectX® 8.1 support (32 MB recommended)
700 MB HD space

 

My system
Compaq Evo N1020v (laptop)
Microsoft Windows XP Professional
Video Card: RADEON IGP 340M
Sound Card:ALi Audio Accelerator WDM driver
RAM:256 MB
Intel(R) Pentium(R) 4 CPU 2.40GHz
Speed: 2388 MHz
Total Capacity: 93.15 GB
Used: 11.56 GB
Free: 81.59 GB

[Fed]

I think your problem will be solved when you get more ram.

[Perfect Agent52]

Re-install it. I had the same problem, I re-installed it, then messed with the video settings to fix it. I will give you specs when I get home.