I recently reformatted my HP Pavilion p6580t and installed Windows 7 Ultimate on it. For some reason, the sleep timer isn't working. It won't put alseep the monitor, nor computer. If I manually put it to sleep it works, but won't off the timer. The only thing I updated was the graphics driver SP59747 and install TP Link wireless usb network stick on the computer. After installing, the sleep timer isn't working. It did seem to work before installing those 2 items. Do you guys have any idea what's going on? Any help would be greatly appreciated.