It turned out to be a problem with the Windows 7 built-in correction color (calibrate color) feature. Using this correction color feature will result in an ICC profile, which Windows 7 will use as the default display, and once the ICC profile is defined with a correction color, the speed of Windows Photo Viewer will become as slow as crawling, and the ICC profile will be restored as soon as it is deleted Normal.
If you encounter this problem and need to use the correct color, you can use the video card itself with the control components to correct the color, do not use the Windows 7 built-in correction color (calibrate color).
If you have never used the Windows 7 built-in correction color (calibrate color), you will not be able to raise this ICC profile, no problem.
Delete this ICC profile to the bottom position
Windowssystem32spooldriverscolorcalibrateddisplayprofile-0.icc