It was a some kind of virus on a computer and noone of the keys was working properly(could only switch between windows by clicking and nothing more), both (left and right) shows menu now after removing the virus. It is an Acer laptop with Windows 8.
How to reset or configure them to work as...
Microsoft Update, as opposed to Windows Update, is of critical necessity to most Windows users. Unfortunately, more times than not it, goes left either uninstalled or ignored all together with the assumption that the operating system will just "take care of itself".