Unable to Launch Photoshop CS5 (64-bit), Related to Adobe Application Manager

Question

i am at my wits end. any help provided will be greatly appreciated.
i installed photoshop cs5 (i run windows 7 64-bit) normally after uninstalling my cs4 normally (no clean installation or whatnot) and this time i chose to exclude the 32 bit version since i wouldn't require it.
upon installation i try to launch the programme and it says that the Adobe Application Manager is required to start it, so i do a quick google and i download the Application Manager. now here's the problem.
when i try to launch the installation for the app manager all i get is a loading bar with installation initializing. this bar goes to completion but after that it just shuts on me and nothing else happens.
i have tried:
1) restarting (obviously)
2) extracting the installer to a different location
3) trying to run the clean installation procedure, but this results in further problems:
the clean install package came with instructions to install a installer cleanup utility provided by windows which is no longer being provided because of certain risks. having found that program somewhere else on the internet anyway i start it up and it gives me an error saying it can't find msizap.exe and fails to install anyway. i hence end up not having used the cleanup system at all.
solutions to either problem, the former especially will be greatly appreciated.
thanks in advance.
edit: reinstalling both 32 and 64 bit editions together results in 32 bit working and 64 bit still requiring the application manager. for the life of me i don't see why one requires it and the other doesn't.

Answer 1

I understand that you did not choose to put Photoshop 32 bit in C:, it just went there on its own.
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zadragon wrote:
to optimise windows i have it installed to a small partition (this is my C:) and leave the remaining large portion (D:) for installs of all software.
Adobe software is known to work better when installed on C:.  I think you may be experiencing that first-hand here.
Why have you partitioned your system this way?  I'm curious, what do you believe you have optimized by doing this?  In my experience, partitioning your system as you have done will net you more problems than performance.  Even outside of applications you install, Windows itself will continue to expand over time (search for winsxs, for example, and of course there are Windows Updates and Service Packs).
I could see perhaps using a single super-fast limited C: physical drive, with programs and other files on another physical drive with a separate controller, improving performance - but I don't believe there's any way a drive that's been partitioned as you have described is going to help performance.  And you should know that Microsoft has done many things (e.g., SuperFetch) to optimize performance when set up in a more typical fashion (on one big C: partition).
-Noel