[game become slow]

when i play any game that my computer run it smoothly after many minutes the game slow down for mins and come again and when i contuine the game i t slow down again and etc ....

 

please , respond to solve my problem

 

 

 

 

 

 

 

 

 

 

 

Operating system:Windows 7 Ultimate (64 bit)

System root: C:Windows

Available physical memory: 5118 MB

CPU: Pentium® Dual-Core CPU E5700 @ 3.00GHz

Drive Info:

C: 99.91 GB

D: 182.88 GB

E: 182.88 GB

Internet Explorer: 8.0