Consider the following scenario:
- You set the power setting when closing the lid on your laptop running Windows 8.1 to "Do nothing"
- You set the power plan settings for turning off the display and putting the computer to sleep to "Never"
- You connect the laptop to an external monitor via HDMI or DisplayPort, and output the display to the external monitor
- You lock the PC and close the lid
- While the lid is closed, you unplug the external monitor cable
Your computer is low on memory