I'm wrong. It's 5 total for Ultimate and Ultimate K (whatever that is) and combined 64 bit and 32 bit versions. Then 5 for all versions of Pro, 5 for all version of Home, etc.
Ultimate K is Ultimate without Messenger and related things. K is for Korea.
Nothing stops you from installing the Messenger stuff on the K SKU's or the Media players stuff with the N (European Union) SKU's. Once you do that, they function just like the no-lettered SKU's.
