This sounds like something for Adobe Tech Support:
This takes time, but it usually worth it. You may find yourself chatting (via keyboard) with someone in India, but they have always helped me in situations like yours.
Topic or subject titles should be clear, pertinent and concise so that individual users can tell at a glance if they can help or not.
That field is not for attempting to fit your entire question in there.
Please keep this in mind next time you post. Thank you.
Can you provide more details?
Mac or Windows?
Where are you installing from?
Have you tried installing with a new user account? blogs.adobe.com/crawlspace/2012/07/photoshop-basic-troubleshooting-steps-to-fix-most-issu es.html#Permissions
Let us know how it goes,
My guess is that the OP is on Windows. That's why i stayed away from any speculation and from asking for more details.
The error message implies there's a 32-bit and a 64-bit install. On the Mac, it's a single binary encompassing both versions