Thanks Gert.
Worked flawlessly. Million thanks.
I also tested to upgrade from Windows 8.0 with a NAV 2013 client installed to Windows 8.1 and all went ok. As you said it should be the installer.
I created a batch file to make thinks easier:
*** NOTE ****: you should change the last two lines, because they should have your correct language, in my case it's ES for spanish, enter to the folders and search for the exact names or your language files).
@ECHO OFF
set navserver=admonsrv1
"\\%navserver%\Microsoft Dynamics Nav 2013\Prerequisite Components\Microsoft .NET Framework 3.5\MSCHART.EXE" /passive
"\\%navserver%\Microsoft Dynamics Nav 2013\Prerequisite Components\Microsoft Visual Studio 2010 Tools For Office Redist\vstor40_x64.exe" /q
"\\%navserver%\Microsoft Dynamics Nav 2013\Prerequisite Components\Microsoft Report Viewer 2010\ReportViewer.exe" /passive
"\\%navserver%\Microsoft Dynamics Nav 2013\RoleTailoredClient\Microsoft Dynamics NAV RoleTailored Client.msi" /passive
"\\%navserver%\Microsoft Dynamics Nav 2013\Documentation\Documentation.msi" /passive
"\\%navserver%\Microsoft Dynamics Nav 2013\Installers\ES\RTC\RoleTailoredClient.Local.Es.msi" /passive
"\\%navserver%\Microsoft Dynamics Nav 2013\Installers\ES\Documentation\Documentation.Local.Es.msi" /passive