When I logoff I usually keep my system in standby. When I am ready to turn the machine back on, I usually (and this may be wrond) touch any key on the keyboard or the mouse and 1 of 2 things will happen..either the machine will start up again no problem or it will make this buzzing sound like I've done something wrong and then I have to manually power the machine off and turn it back on..what is the problem with me leaving the machine in standby mode?