How to Fix Mouse Disappearing Issue?

To fix mouse pointer disappearing issue, step-by-step instructions given below should be followed:

Log on to Windows 8 computer with the administrator account.
Click Desktop tile from the Start screen to go the desktop window.
Once on the desktop screen, hover mouse to the bottom right corner.
From the displayed options, click Settings.
From the Settings pane, click Control Panel.
On Control Panel window, click Hardware and Sound category.
On Hardware and Sound window, click Mouse under Devices and Printers category form the right pane.
On the displayed Mouse Properties box, go to Pointer Options tab.
On the selected tab, uncheck Hide pointer while typing checkbox under Visibility section.

Could be the Fn+F7 issue