Well, I have Windows 7 Home Premium 64-bit and it works with that. Although I do not or have not yet used soft synths the Cakewalk stuff like that seems to be listed and should work. Some other things that are listed before in Windows XP do not work in Audio FX - Processes whatever that is, just had it up to. But the Cakewalk stuff works there and I do have not done Midi but I suppose the Cakewalk stuff in FX works there also.
Some other things are not Cakewalk but are always listed, and I suppose I should delete them. Also Sonitus EQ and Reverb work.
So I suppose mainly Cakewalk stuff works, although I usually just do Audio so far.
There is the thread above also in this forum:
http://forum.cakewalk.com...-x64-FAQ-m1852658.aspx In fact there are other 32-bit programs also on my computer that work like Firefox I think and anti-virus and other ones marked in Task Manager as *32 with the program meaning those are 32-bit programs.