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How to install and activate MATLAB R20 12a
After downloading matlab20 12a, double-click setup.exe to start the installation.

In the pop-up interface, select "Use installation file key" and click "Next".

Accept the license agreement and click Next.

Select "I already have the file installation key for my license", enter the key:12313-94680-65562-90832, and then select "Next".

Select the installation path. Note that the installation path should not have a Chinese name. It is recommended to install on a non-system disk.

According to personal needs, select the Matlab components to be installed and select "Next".

Go on to the next step.

Click Install to start installing the software. The installation process is quite long, and the speed depends on the computer configuration, so you can leave temporarily to do other things.

After the installation is complete, please select Activate.

Select "Manually activate without using the Internet".

Select "Enter the full path of the license file (including the file name)", browse the license file "license.lic" and insert the license.

At this point, the activation work is completed. However, don't open the software in a hurry.

Please open the serial folder. Matlab32 for 32-bit system and Matlab64 for 64-bit system.

Copy the bin folder to the bin folder under the installation path and crack it.