Unable to select picture

I'm going to describe this problem the best I can. When I go on Google and for instance type in Boeing 737 or other subjects with pictures, then I select "Image" of the picture, I get a whole slew of pictures on the subject. Then I select (left click) one of the pictures and normally that picture will stand out on its own but my problem was that when I do that nothing happens. I tried on different subjects but still the problem persists. This only happened yesterday when I was collecting pictures of commercial jets I planned to use as screensaver. Any ideas why this is happening?

Thanks