Now send the package you want to apply to the device with - adb sideload

(Now send the package you want to apply to the device with “adb sideload <filename>”. . .) – this message appeared on my Tablet that have an Android Operating System, tried to reboot my Tablet by long pressing the power button but the device power doesn’t turn off. Tried to search the net for this type of problem, most of the solution I find is to press the power and volume button simultaneously for how many seconds to reboot the device but this doesn’t work also. Lastly I decided to let the power of my tablet drained until it turned “OFF” by itself then recharge it. I turned the power “ON” after several minutes of charging and the Tablet works normally.