With Microsoft Windows 7 and above the user can set the gamma correction through the display color calibration tool dccw.exe or other programs. These programs create an ICC profile file and load it as default. This makes color management easy. Increase the gamma slider in the dccw program until the last colored area, often the green color, has the same brightness in checkered and homogeneous area. Use the color balance or individual colors gamma correction sliders in the gamma correction programs to adjust the two other colors. Some old graphics card drivers do not load the color Look Up Table correctly after waking up from standby or hibernate mode and show wrong gamma. In this case update the graphics card driver.