windows photo gallery: pictures brightness are too much

Hello,
I have a problem about colors. I have 17" LCD monitor (philips 170x6) and
drivers installed. In Windows Photo Gallery, pictures thumbnails appear nice.
But when I double click, I see the real size of the picture but its
brightness is too much. Too much white on the picture. I know that the
picture is not so bright. But it appears so bright.

In 3rd party applications, there's no problem. Irfanview or office's picture
viewer shows the correct colors, not bright.

What can be the problem ? How can i solve this?