Why do I receive "Products Already Installed" when installing MATLAB or additional toolboxes?

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Why do I receive the following warning when re-installing MATLAB or additional toolboxes?
Products Already installed:
All selected products are already installed.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 15 Jul 2021
As of R2021b, the MathWorks Installer will provide a warning message if you attempt to reinstall products that are already installed.  The MathWorks Installer will not automatically uninstall and reinstall software. Please see below for instructions on:
  • Uninstalling MATLAB
  • Reinstalling a particular toolbox
Uninstalling MATLAB
To reinstall MATLAB, you must first uninstall MATLAB, then you will be able to proceed in the installation.  For instructions on how to uninstall MATLAB on each supported Operating System, please refer to the following links:
Reinstalling a particular toolbox, other than MATLAB
If you would like to reinstall a particular toolbox, you must first uninstall the toolbox:
Once uninstalled, you may proceed with the installation.
  6 Comments

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More Answers (56)

ALDAIR CERVANTES
ALDAIR CERVANTES on 26 Aug 2021
Porque me aparece esto almomento de instalar la versión mas reciente de matlab?
  4 Comments

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chi nguyen dinh
chi nguyen dinh on 11 Oct 2021
I cannot open Matlab 2021b.
  2 Comments

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Emre Yildiz
Emre Yildiz on 28 Oct 2021
Hallo, after the complete installation of MATLAB my macOS device won't open the programm ?

Ramamohan Tummala
Ramamohan Tummala on 29 Oct 2021
Edited: Walter Roberson on 29 Oct 2021
I did not understand that this package is already installed
can I continue installation
  1 Comment
Walter Roberson
Walter Roberson on 29 Oct 2021
Yes, you can continue installation. The installer will install any products that you asked to install that are not already installed.

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EDILBERTO FRAGOZO MARENCO
EDILBERTO FRAGOZO MARENCO on 12 Nov 2021
The installation was not achieved, that is the reason why I need to do the installation again.
the shortcut does not appear on my desktop



NAVEEN V
NAVEEN V on 24 Nov 2021
i cannot open matlab because after insalliation i closed the window without activation.And now i dont have activation key, matlab is not opening on terminal.











Lubos Vargovcik
Lubos Vargovcik on 27 Dec 2021
I requested an extension of the original trial by 30 days
  1 Comment
Walter Roberson
Walter Roberson on 30 Dec 2021 at 5:29
The volunteers who answer questions here do not have access to the license database. You will need to contact Mathworks Sales to request extensions for any trial license.

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karthik sk
karthik sk on 29 Dec 2021 at 23:33
the MATLAP trIial by 3-0 days is expreid so extension to requested to install the MATLAB
  1 Comment
Walter Roberson
Walter Roberson on 30 Dec 2021 at 5:29
The volunteers who answer questions here do not have access to the license database. You will need to contact Mathworks Sales to request extensions for any trial license.

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Muhammad Ashhad  Khan
Muhammad Ashhad Khan on 7 Jan 2022 at 15:03
Actually I had changed the user name while I was installing the matlab and my pc account name is change now i wanna to reinstall it




Rimantas Barauskas
Rimantas Barauskas on 18 Jan 2022 at 18:02
I've got a message that the license expires in 12 days
  1 Comment
Walter Roberson
Walter Roberson on 19 Jan 2022 at 0:24
If you purchased the license yourself then you will need to purchase a renewal, or else the license will stop working.
If you did not purchase the license yourself, then contact whoever purchased the license for you.

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