In this tutorial, I will explain how to solve error 0x800f0954 with the PowerShell Add-WindowsCapability Cmdlet when trying to install a Windows feature.
This error mainly occurs when you use a WSUS server to update your Windows computers and therefore when using the Cmdlet Add-WindowsCapability, it will look for files on the WSUS server.
Here is the error:
To solve this problem, you must tell the computer to use Windows Update for optional components, this configuration is done using Group Policy.
This need being punctual, I advise you to do this configuration locally.
Open the Local Group Policy Editor console: gpedit.msc.
Go to the location: Computer Configuration / Administrative Templates / System and find the setting Specify settings for installing optional components and repairing component 1, double click on it to open it.
Enable setting 1 and check the box 2 Download repair content and optional options from Windows Update instead of Windows Server Update Services (WSUS), then click Apply buttons 3> > and OK 4 to confirm and close.
Enter the gpupdate /force command to update the settings.
You should be able to run your Add-WindowsCapability command again and it should run without error.