Hi All, I have Dell Inspiron 3148 which is running with Windows 8 OS. Since I have installed Windows Updates, system doesn't go to Sleep Mode. I tried to wake it up with Mouse and Keyboard but did not work. I checked on web and found that Keyboard and Mouse setting does help in waking up the computer, so I went to settings and checked the option 'use this device to wake up the computer' but nothing has changed. Please help. Regards, Walter Garcia