Windows 7: 3D gaming running slow like hell

Hi it's me Long here,
I have problems with 3D gaming and need some help. Ever since I bought my computer everything is been running smooth and fast, but now it doesn't do that anymore. I play a 3D online game name SilkroadOnline ( JOYMAX.COM - Global Hub of Fun :: SilkroadOnline ). The graphics of the game is huge, and may take up to hours of waiting for the download to finish. I downloaded the game for quite a few times (2,3), but I never knew that after downloading it for a few times the game process will be running slow like hell. It's been 4 years now, and I've had enough of this issue of the game running slow. I can't barely do anything fun on my computer anymore. If there is a way to solve this problem please help me, I would like to have some fun after these 4 years of "boringness." Please respond as soon as possible, or E-Mail anything to me @---> mamli_tos@hotmail.com


System Information

OS Name---> Microsoft Windows 7 Ultimate
Version---> 6.1.7601 Service Pack 1 Build 7601
Other OS Description---> Not Available
OS Manufacturer---> Microsoft Corporation
System Name---> *****-PC
System Manufacturer---> HP-Pavilion
System Model---> NP253AA-ABA p6157c
System Type---> x64-based PC
Processor ---> AMD Phenom(tm) 9650 Quad-Core Processor, 2300 Mhz, 4 Core(s), 4 Logical Processor(s)
BIOS Version/Date---> American Megatrends Inc. 5.16, 7/1/2009
SMBIOS Version---> 2.5
Windows Directory---> C:\Windows
System Directory---> C:\Windows\system32
Boot Device---> \Device\HarddiskVolume1
Locale---> United States
Hardware Abstraction Layer---> Version = "6.1.7601.17514"
User Name---> *****-PC\** ***
Time Zone---> Alaskan Daylight Time
Installed Physical Memory (RAM)---> 7.00 GB
Total Physical Memory---> 6.75 GB
Available Physical Memory---> 4.45 GB
Total Virtual Memory---> 13.5 GB
Available Virtual Memory---> 11.2 GB
Page File Space---> 6.75 GB
Page File---> C:\pagefile.sys