Here's how Aida shows in my case:
Field Value
Operating System Properties
OS Name Microsoft Windows 8.1 Professional
OS Language English (United States)
OS Installer Language English (United States)
OS Kernel Type Multiprocessor Free (64-bit)
OS Version 6.3.9600.17031 (Win8.1 RTM)
OS Service Pack -
OS Installation Date 30-Oct-13
OS Root C:\WINDOWS
Mine shows:
Operating System Properties
OS Name Windows 8.1 Pro with Media Center Professional
OS Language Unknown
OS Kernel Type Multiprocessor Free
OS Version 6.3.9600
OS Service Pack - None
OS Root C:\WINDOWS