Right click menu keeps on popping up even if I don’t press the button

I have Windows 10 pre-installed on my Compaq Presario C081. After boot up, the right-click context menu appears automatically. Whenever I move the mouse over any desktop icon OR around on the search area (IE, Chrome, or any other browser), the right-click context menu instantly appears without clicking. Because of this problem, I am not able to type anything in the word/excel document, etc. This problem happens with both the touchpad and USB mouse. It is also noticed that when I move my pointer on the Taskbar, the right click taskbar context menu appearing. After searching the internet for hours, I am unable to find a solution. Even though I reset the laptop, the same problem still persists. Any idea how to solve the problem.

Now the problem is temporarily solved! On reading some posts, I realized that the "Menu Key" (in between Windows Key & Ctrl Key) is malfunctioning. Whenever the problem occures, I need to hit on this "Menu Key" and the Laptop will work perfectly. However, I have to do the same practice again if the Lap is rebooted.