You don't say which version of Windows 7 you are using is it x86 (32 bit) x86-64 (64 bit) starter, home, pro, ultimate
You may find your problem stems from using home or lower versions of Windows 7 which either don't support the use of RAID arrays or only want you to use the built in softraid in drive management
Thanks for your suggestion.
I am using win7 sp1 Ultimate, so should not have any limitation.
This "license limitation" message came from AMD's raidXpert, it is not related to microsoft.
Dan, I hope you are aware that AMD officially supports W10 1703 and above. What BIOS/UEFI and mainboard version are you using? Enjoy, John.