Why do I get the error "An error occurred while attempting to shut down MATLAB."?

When trying to shut down MATLAB so I can update it, I get the following error:

An error occurred while attempting to shut down MATLAB. For help, see this MATLAB Answer.
Why am I receiving this error?

Answer 1

[MathWorks Support Team]

To resolve this error, please reboot your computer and try the update again. 

[G A]

It did not help in my case. Previous time, I unistalled Matlab and installed updated version. The same I am trying for the second update.