I have just done an upgrade from Windows 8 Pro to Windows 8.1 via the Windows Store.
All went well during the installation process, but after everything was finished, I noticed a watermark "Windows 8 Pro with Media Center, Build 9600" on the desktop.
After doing some googling, it appeared that only the "non-full" versions of Windows 8.1 will have this.
However, the Windows 8 version I started out with was genuine and activated. Also, going to 'Systems' in Windows 8.1 also revealed Windows is activated.
Why am I facing this issue when I have a full version of Windows 8 to begin with?
Also note that the watermark shows only the above and nothing else (Other people have the 'Secure Boot' thing)