Troubleshooting: Installing .NET Framework 3.5

When installing softwares like E-prime or BrainVision Analyzer, we are required to install .NET Framework 3.5 component. Although the process is straightforward and sometimes we already have the component previously installed, it is possible that the installation causes an error (error code 0x800F081F), specially if your laboratory computer uses Windows 10. Here we show you how to solve this issue.

First, you can check if the component is already installed on your device. Go to Control Panel > Programs > Turn Windows features on or off, verify if .NET Framework 3.5 checkbox is selected and then proceed with the software installation.

If the error persits, we will have to force the installation with the Windows command prompt (CMD). Prior to this step, we need to have the .NET Framework installation package in our device, which you can typically find on the 'Components' folder of the software we are trying to install (if you can't find in, it is also available for direct download on the Microsoft's website). For now, you can leave the installation package on your local disk folder (C:\).

Go to Start Menu and type 'cmd' and open it with administrator privileges. Copy the following command on the prompt and execute it:

Dism.exe /online /enable-feature /featurename:NetFX3 /source:C:\ /LimitAccess

The prompt will display the installation progress. Once it finishes, run the software setup again and that's it.


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Jackson Cionek

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