- Uninstalling MATLAB
- Reinstalling a particular toolbox
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
on 16 May 2022 at 4:00
Edited: MathWorks Support Team
on 16 May 2022 at 10:56
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
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.
10 Comments
Jimmy Willie Woulo
on 8 May 2022 at 5:56
When i open the mathlab the program wont open, it just read unziped files
More Answers (82)
ALDAIR CERVANTES
on 26 Aug 2021
Porque me aparece esto almomento de instalar la versión mas reciente de matlab?

chi nguyen dinh
on 11 Oct 2021
I cannot open Matlab 2021b.
2 Comments
怡婷 赵
on 7 Dec 2021
i have already uninstalled all the matlab's documentary,but i still be stucked in this process
Claudia Puente
on 29 Sep 2021
because I had problems installing and had to re-download the software.
0 Comments
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.
1 Comment
Miguel Flores
on 12 Oct 2021
Because i have problem with EXCEL an lose interface y need reinstale
0 Comments
Ljiljana Milic
on 14 Oct 2021
I cannot start Matlab R2021b since I didnot completed instalation properly.
1 Comment
Emre Yildiz
on 28 Oct 2021
Hallo, after the complete installation of MATLAB my macOS device won't open the programm ?
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
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.
Israel Palma Quiroz
on 30 Oct 2021
The installation was not achieved, that is the reason why I need to do the installation again
1 Comment
Walter Roberson
on 30 Oct 2021
Delete the entire MATLAB installation directory in C:\ and then install again.
Mothusi Boapotswe
on 4 Nov 2021
i am failing to complete the installation
1 Comment
Walter Roberson
on 27 Nov 2021
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
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.
1 Comment
gopi h
on 8 Nov 2021
i failed to install the softwate during installation
1 Comment
Walter Roberson
on 27 Nov 2021
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
Aycheh Hurani
on 10 Nov 2021
The installation was not achieved, that is the reason why I need to do the installation again
0 Comments
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
0 Comments
Bernard De Vera
on 19 Nov 2021
it says that Matlab has been installed but i cannot where is the dashboard?
0 Comments
Vyshnavi Arram
on 22 Nov 2021
ok but i want again to my folder
1 Comment
Walter Roberson
on 27 Nov 2021
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
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
on 24 Nov 2021
I want again on my folder
1 Comment
Walter Roberson
on 27 Nov 2021
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
Stanislaus Ding
on 26 Nov 2021
I Want to try
1 Comment
Walter Roberson
on 27 Nov 2021
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
Phisit Wannakham
on 27 Nov 2021
I don't know.
1 Comment
Walter Roberson
on 27 Nov 2021
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
Jyotin Gokli
on 30 Nov 2021
I have uninstalled MATLAB still it gives me same error
1 Comment
Walter Roberson
on 30 Nov 2021
I think you are going to need to contact Mathworks for free installation support.
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?
Lubos Vargovcik
on 27 Dec 2021
I requested an extension of the original trial by 30 days
1 Comment
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.
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
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.
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
0 Comments
Rimantas Barauskas
on 18 Jan 2022
I've got a message that the license expires in 12 days
1 Comment
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.
Devendra Singh
on 2 Feb 2022
i want to updated or installed my trail software.
1 Comment
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
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
on 1 Mar 2022
for university
2 Comments
Walter Roberson
on 3 Mar 2022
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
Urmi Pandya
on 4 Mar 2022
because matlab is already installed in your PC
1 Comment
Walter Roberson
on 7 Mar 2022
Use your system facilities to delete the MATLAB installation directory. Then reinstall MATLAB.
Mohammed ZIANI
on 7 Mar 2022
I cannot open Matlab 2021b
1 Comment
Walter Roberson
on 10 Apr 2022
It is not clear how this is related to the "Products already installed" situation ?
Dagnover Largo Bueno
on 8 Mar 2022
i cant opne matlab 2021b
1 Comment
Walter Roberson
on 10 Apr 2022
It is not clear how this is related to the "Products already installed" situation ?
Fatimata Guiro
on 12 Mar 2022
I uninstalled matlab
1 Comment
Walter Roberson
on 10 Apr 2022
It is not clear how this is related to the "Products already installed" situation ?
Fatimata Guiro
on 12 Mar 2022
i cant upon matlab 2021b
1 Comment
Walter Roberson
on 10 Apr 2022
It is not clear how this is related to the "Products already installed" situation ?
Jarryll Valdez
on 18 Mar 2022
because i want it
1 Comment
Walter Roberson
on 10 Apr 2022
It is not clear how this is related to the "Products already installed" situation ?
evan kung
on 18 Mar 2022
I want to open Matlab
1 Comment
Walter Roberson
on 10 Apr 2022
It is not clear how this is related to the "Products already installed" situation ?