open the image in something else. Use word or powerpoint, or even MS picture viewer. See if that makes a difference. Paint is not the best program for viewing files.
The BMP and JPG formats are different. if you change the name from .jpg to .bmp it shouldn't open as the compression algarithims are different.
do they look fine in your browser?
Just remembered something... Reinstall your display drivers. Get them from Intel and reinstall them. This corrected a problem I saw last week.