@Brett: Thank you for the links. But I want the information regarding 64-bit as in the link it is showing as no information available.
@area51reopened: So you want mean to say that it is compatible only with 32-bit and not with 64-bit.
Could you please specify in detail whether it is compatible with 64-bit?
Download the latest version from py website it is only 32-bit as area51reopened stated and before installation right click setup file and select properties and under compatability tab select run this program in compatability mode for windows vista sp2. Then install and it may be ok.