I was rummaging through the services in my (issued) Toshiba Satellite A50 and disabled some processes and accidentally one of them was the TouchPad utility.
This morning when I turned the laptop on, I could only move the cursor by using the mouse, not the touchpad. I tried enabling it like the way I disabled it yesterday, by right-clicking the tray icon, but to no avail.
Then I learned of the shortcut key for enabling/disabling the TouchPad Utility, just by pressing Fn+F9. This toggles the status of the TouchPad utility.