Windows 8 includes a built-in PDF viewer, Windows Reader. This app runs full-screen from the Windows 8 Start screen. However, Microsoft has disabled the use of Windows 8 full-screen apps while you are logged into the built-in administrator account. Therefore, Windows Reader cannot launch, and you cannot view PDF versions of NI product documentation. If you must work in this account type and want to view NI documentation PDFs, install Adobe Reader.
Visit ni.com/windows8 for more information about how Windows 8 affects your test and measurement systems.