Can’t install Office Web Apps Server required .NET 4.5

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Environment:

Windows Server 2012 R2

Office Web Apps Server 2013 with SP1

Issue:

When performing a brand new Office Web Apps Server installation, we received the error during the installation:

“Setup is unable to proceed due to the following error(s): This product requires Microsoft .Net Framework 4.5”

We know that we have .Net 4.5 installed when we ran the Office Web Apps server pre-requisites as per the Technet article https://technet.microsoft.com/en-CA/library/jj219455.aspx

However, we also have .NET 4.6 and .NET 4.6.1 installed because we installed all the windows updates.

Resolution:

To get the Office Web Apps Server to install, we had to remove the .NET 4.6 and .NET 4.6.1

  1. For .NET Framework 4.6.1 we removed the following KB: KB3102467
  2. For .NET Framework 4.6 we removed the following KB: KB3045563

Once the above .NET versions were uninstalled we were able to complete the Office Web Apps installation, once that was completed we ran windows update and re-installed the .NET 4.6/4.6.1

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