File name: 6.1.7850.0.winmain_win8m1.100922-1508_x86fre_client-multisku_retail_en-us.iso
Build type: free
Architechture: x86 (32-bit)
SKU: Starter, Home Basic, Home Premium, Professional, Ultimate

File name: 6.1.7850.0.winmain_win8m1.100922-1508_x86fre_client-enterprise_retail_en-us.iso
Build type: free
Architechture: x86 (32-bit)
SKU: Enterprise

File name: 6.1.7850.0.winmain_win8m1.100922-1508_x86fre_client-enterprise_volume_en-us.iso
Build type: free
Architechture: x86 (32-bit)
SKU: Enterprise

File name: 6.1.7850.0.winmain_win8m1.100922-1508_amd64fre_client-multisku_retail_en-us.iso
Build type: free
Architechture: x64 (64-bit)
SKU: Home Basic, Home Premium, Professional, Ultimate