I have tried using the 64 bit version of itunes on windows 7 64 bit. What I noticed immediately was that windows 7 installed it under the x86 program folders. When I am running iTunes it freezes ALL the time making it completely useless. Especially when I am downloading...it simply stops downloading and stops responding. Does anyone have a fix for these issues or am I on my own till M$ starts releasing some updates. At this point I am currently switching my system from a main OS of windows 7 to a vista-7 dual boot because of this issue.