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 16 May 2022
Edited: MathWorks Support Team on 16 May 2022
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.
  13 Comments
盛书 许
盛书 许 on 9 Aug 2022
Reinstall the computer system, or format the disk installed with MATLAB and then go to the official website for installation

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More Answers (120)

ALDAIR CERVANTES
ALDAIR CERVANTES on 26 Aug 2021
Porque me aparece esto almomento de instalar la versión mas reciente de matlab?
  11 Comments
盛书 许
盛书 许 on 9 Aug 2022
Reinstall the computer system, or format the disk installed with MATLAB and then go to the official website for installation

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

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Claudia Puente
Claudia Puente on 29 Sep 2021
because I had problems installing and had to re-download the software.

Iulia Raluca Ica
Iulia Raluca Ica on 1 Oct 2021
i didint select to appear on desktop the program

Guan-Chyun Hsieh
Guan-Chyun Hsieh on 4 Oct 2021
After I installed, I cannot finish the final process. I guess that the installation may not be finished.

SAVADOGO Assani
SAVADOGO Assani on 9 Oct 2021
Mt first installation was not finished

Miguel Flores
Miguel Flores on 12 Oct 2021
Because i have problem with EXCEL an lose interface y need reinstale

Ljiljana Milic
Ljiljana Milic on 14 Oct 2021
I cannot start Matlab R2021b since I didnot completed instalation properly.

Amrita Pal
Amrita Pal on 20 Oct 2021
i am installing on a different account

Julio César Sigueñas Pacheco
I cannot open Matlab 2021b

Mekdes Eyayu Mequanint
Mekdes Eyayu Mequanint on 27 Oct 2021
My first installation was not finished

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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Israel Palma Quiroz
Israel Palma Quiroz on 30 Oct 2021
The installation was not achieved, that is the reason why I need to do the installation again

Narci Jimenez Alvarado
Narci Jimenez Alvarado on 1 Nov 2021
me aparece que debo resolver la respuesta

Marco Yeh
Marco Yeh on 4 Nov 2021
I change PC

Mothusi Boapotswe
Mothusi Boapotswe on 4 Nov 2021
i am failing to complete the installation

Rovic Umandap
Rovic Umandap on 5 Nov 2021
I uninstalled matlab

Paul Hamilton
Paul Hamilton on 7 Nov 2021
How do I access R2921b. I seem to have already installed this software but when I boot up the MatLab application it still goes to R2021a and opens that version.

gopi h
gopi h on 8 Nov 2021
i failed to install the softwate during installation

Aycheh Hurani
Aycheh Hurani on 10 Nov 2021
The installation was not achieved, that is the reason why I need to do the installation again

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

Bernard De Vera
Bernard De Vera on 19 Nov 2021
it says that Matlab has been installed but i cannot where is the dashboard?

Vyshnavi Arram
Vyshnavi Arram on 22 Nov 2021
ok but i want again to my folder

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.

Eva Vaz
Eva Vaz on 24 Nov 2021
I want again on my folder

Stanislaus Ding
Stanislaus Ding on 26 Nov 2021
I Want to try

Phisit Wannakham
Phisit Wannakham on 27 Nov 2021
I don't know.

Jyotin Gokli
Jyotin Gokli on 30 Nov 2021
I have uninstalled MATLAB still it gives me same error

Wissarut Jarassopon
Wissarut Jarassopon on 5 Dec 2021
I uninstalled matlab

Zoher Chiba
Zoher Chiba on 15 Dec 2021
I had a trial Matlab for 1 month. I have now purchased a home license. I believe I have to uninstall the trial Matlab brfore I install my home licensed Matlab. How do I do that?

Saadou MAHAMANE
Saadou MAHAMANE on 15 Dec 2021
i uninstalled

Abdulmalik Alshunaifi
Abdulmalik Alshunaifi on 15 Dec 2021
i uninstalled

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
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
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
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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Yitayal Ewnetu Chanie
Yitayal Ewnetu Chanie on 2 Jan 2022
I can't integrate android studio to matlab simulink.

Marc Adrianne  Guevarra
Marc Adrianne Guevarra on 6 Jan 2022
just did to format the app

Muhammad Ashhad  Khan
Muhammad Ashhad Khan on 7 Jan 2022
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

Simon Green
Simon Green on 13 Jan 2022
Installaltion did not go as it should have

Margarita Toapanta
Margarita Toapanta on 14 Jan 2022
puedo volver a instalar matlab?

Rimantas Barauskas
Rimantas Barauskas on 18 Jan 2022
I've got a message that the license expires in 12 days
  1 Comment
Walter Roberson
Walter Roberson on 19 Jan 2022
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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jorge ivan  gallegos rosales
por que me manda aqui y no abre matlab?

智仁 罗
智仁 罗 on 23 Jan 2022
some toolbox cannot be opened

Emiliana Moreno
Emiliana Moreno on 25 Jan 2022
por que aparece instalado y no esta instalado

Ebram Fahim
Ebram Fahim on 28 Jan 2022
Edited: Ebram Fahim on 28 Jan 2022
I can not open my matlap

Devendra Singh
Devendra Singh on 2 Feb 2022
i want to updated or installed my trail software.
  1 Comment
Walter Roberson
Walter Roberson on 10 Apr 2022
If somehow you are moving to a new trial version of MATLAB, then use the uninstaller to remove the old trial version.
If you obtained a new (extended) trial license, then in the command window
Help -> Licensing -> Update current licenses

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Rafael Alberto Pech Uc
Rafael Alberto Pech Uc on 9 Feb 2022
no puedo abrilo ayuda

Robert Estrada
Robert Estrada on 19 Feb 2022
It's not working properly

DIEGO JOEL GUZMAN UMAJINGA
I want to re-install the MATLAB 2021b

ntabala benoit
ntabala benoit on 27 Feb 2022
i lost my computer with the application installed on the machine, now am failling to activate the app into the other computer

LUCA PAOLINI
LUCA PAOLINI on 1 Mar 2022
for university

Urmi Pandya
Urmi Pandya on 4 Mar 2022
because matlab is already installed in your PC

Mohammed ZIANI
Mohammed ZIANI on 7 Mar 2022
I cannot open Matlab 2021b

Dagnover Largo Bueno
Dagnover Largo Bueno on 8 Mar 2022
i cant opne matlab 2021b

Fatimata  Guiro
Fatimata Guiro on 12 Mar 2022
I uninstalled matlab