Many have found their monitors placed into a "dimmed" mode after installing W8 and nothing you do changes the problem. There is a solution. After you install W8, do your activation and then: Go to your manufacture's website or your Graphics website and download the W7 graphics driver. Install the W7 graphics driver into a new directory and then through Device Manager, select the GRAPHICS listing, right click on the existing W8 graphics driver and request an update. Choose the directory into which you have loaded your W7 graphics driver you downloaded and tell the computer to select this driver. Your monitor should regain it normal brightness and can be managed as normal.