Why is the wireless mouse likely not working after being set up for a new employee?

The reason why the wireless mouse is likely not working after being set up for a new employee is that the USB mouse receiver is not plugged into the computer. For a wireless mouse to function properly, it requires a USB receiver to connect to the computer. This receiver communicates wirelessly with the mouse, enabling it to send input signals to the computer.

If the receiver is not connected, the computer will not recognize the mouse, resulting in it being unresponsive. This is a common oversight when setting up a new device, especially if the USB receiver was not immediately visible or was overlooked during the initial setup process.

The other options may also cause issues, but they are not as directly connected to the initial setup. If the mouse were out of battery, it would need new batteries to function, and the issue would persist regardless of the receiver's connection. An incompatibility could be a factor, but most wireless mice are designed to work across a wide range of systems. Lastly, if the drivers were missing, the mouse might connect initially but would not function correctly; however, this is less common as many operating systems have built-in support for popular wireless input devices.