I'm having the same problem on vista 64. I keep getting a permission problem installing to "Program Files (x86)". The instructions on the adobe website say to change ownership on the ProgramData folder which doesn't help. I tried redirecting the install to ProgramData but it still tries to write to (x86) folder. I tried changing ownership of Program Files(x86)/adobe and that didn't work. I can't even vew that folder. I am working from an administrator account. Please help.
I tried all you said, but it's always the same problem. At this time, i use another pdf reader wich is FOXIT PDF.