Acer Aspire V7-581 - Manual (Page 57)

Power management - 57
Note: If Fast startup is off, your computer will take longer to start from
Sleep. Your computer will also not start if it receives an instruction to
start over a network (Wake on LAN).
1. Open the Desktop.
2. Click Power Options in the Notification area.
3. Select More Power Options.
4. Select Choose what the power buttons do.