Try using these drivers click here liaoming71, instead of the drivers on the CD. As your computer is restarting when the problem occurs, right-click on the "My Computer" icon on your Desktop, choose "Properties", click the "Advanced" tab followed by Settings button in the "Startup and Recovery" section. In the "System Failure" section, untick the "Automatically Restart" option, click OK, Apply and OK to exit.
Now when the problem occurs again, rather than restarting, your computer will display an error message. Post that error message here, it might give some clue as to what is happening.