Asus T100TA - Manual (Page 17)

Notebook PC E-Manual 1
Power button
Press the power button to turn your Notebook PC on, put it to
sleep mode, and wake it up from sleep mode.
In the event that your Notebook PC becomes unresponsive,
press and hold the power button for about ten (10) seconds to
force it to shut down.
IMPORTANT! Forcing the system to restart may result to data
loss. We strongly recommend that you back up your data
regularly.
Volume button
The volume button allows you to increase or decrease the
volume level of your Notebook PC.
Windows® button
Press this button to go back to Start screen. If you are already in
the Start screen, press this button to go back to the last app you
opened.