Driver has stoped responding ?  

While I work on comp,sometimes I got this message,and the screen is flashing for a moment. What's this? Is driver out of date,or?

That is your graphics driver. Go to the website of your graphics card and update.
http://www.nvidia.com/Download/index.aspx?lang=en-us
or
Not as good, go to device manager (type that in search) and look for the graphics driver (Nvidia) and update using that method.

Thanks for the reply. Drivers are installed,so I will see,if it do that again ...

So I installed the lattest driver,and again I got this:

Type event viewer in search

Look for critical errors that occured at the time of the notice.

Here is it:

Microsoft says the same thing that I have said its the Graphics Driver
They go on to say that you should try to update from the automatic updater.
Event ID 4101

Did you try re-installing the drivers? If yes, did you use Driver sweeper?