My desktop PC refuses to allow me to turn off "power managent." I have tried all the options but when I leave my PC it has a dialogue box that tells me my computer can not go on stanby because a progrom or device driver will not permit it. It suggests that I close all program and try again. Of course that is nonsense because I'm back at the computer and do not want it to be on standby. The irritating part is that the dialogue box will not let me close it. I have one choice... "OK," the clicking of which makes the computer attempt to go into standby. I have to live with the dialogue box until I reboot, which is not often. The "X" is greyed out.