I hit this on a recent install of Office Web Apps on Server 2008 R2, odd issue. After installing WAC I get this error: New-OfficeWebAppsFarm : The operation failed. The server did not meet the following prerequisites: Windows Update KB2592525 must be installed. Yet when you try to install that patch on Windows it won’t install: Full credit to Ayman Saleh for the solution on this one: Download...