When I did the steps outlined in the OP it was not enough and I could not see any change colorwise on the Desktop. After I'd done what is suggested here
in the first reply, I could see the difference.
2. ENABLE CALIBRATION LOADING BY WINDOWS
Here's the hidden bit of help file...
To enable or disable calibration loading by Windows , you must be logged on with a user account that has administrative privileges.
Click to open Color Management.
Click the Advanced tab, and click Change system defaults .
Click the Advanced tab in the Color Management - System Defaults dialog box, and do one of the following:
To enable Windows to load display calibrations, select the Use Windows display calibration check box.
To prevent Windows from loading display calibrations, clear the Use Windows display calibration check box.
Click Close in the Color Management - System Defaults dialog box.
Click Close in the Color Management dialog box.