Error Installing 2014a Installer has encountered a Problem and quits

I am unable to install the new version of MatLab 2014a. I had the previous prerelease and my error file is below. I currently have no functioning copy of matlab! HELP!

(Mar 12, 2014 10:32:51) Task MATLAB R2014a Startup Accelerator for C:\Program Files\MATLAB\R2014a\bin\win64\MATLABStartupAccelerator.exe exists (Mar 12, 2014 10:32:51) Stopping task MATLAB R2014a Startup Accelerator (Mar 12, 2014 10:32:51) java.lang.NullPointerException at com.mathworks.install.ComponentSizeAggregator.add(ComponentSizeAggregator.java:13) at com.mathworks.install.ProductInstallerImpl.downloadProducts(ProductInstallerImpl.java:96) at com.mathworks.install.ProductInstallerImpl.installProducts(ProductInstallerImpl.java:57) at com.mathworks.install.InstallerImpl.install(InstallerImpl.java:96) at com.mathworks.installwizard.model.InstallTask.execute(InstallTask.java:46) at com.mathworks.installwizard.model.AbstractBackgroundTask.execute(AbstractBackgroundTask.java:38) at com.mathworks.installwizard.model.AbstractTask.call(AbstractTask.java:73) at com.mathworks.installwizard.model.AbstractTask.call(AbstractTask.java:23) at com.mathworks.wizard.worker.WorkerImpl.doInBackground(WorkerImpl.java:24) at javax.swing.SwingWorker$1.call(Unknown Source) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at javax.swing.SwingWorker.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

(Mar 12, 2014 10:32:51) Error: The application encountered an unexpected error and needs to close. You may want to try re-installing your product(s). More information can be found at C:\Users\Tom\AppData\Local\Temp\mathworks_Tom.log (Mar 12, 2014 10:32:52) Exiting with status -1 (Mar 12, 2014 10:32:52) End - Unsuccessful

Answer 1

[Sean de Wolski]

The other solution that you commented on is correct. The directory that you have to remove will look like:

C:\Users\[yourusername]\Downloads\MathWorks\R2014a

Delete the whole MathWorks directory.

[Thomas Dearing]

ah ha! Eureka! thank you. I did not realize the folder was in the downloads directory

[Sean de Wolski]

That was about the same expression I had Monday morning :)

[Kostas Kevrekidis]

I had the same problem and this solution worked.

[Jay Son]

What a nice

[Shihao Wen]

Nice Nice Nice it works