(Error 101) Can't Install PS CS5 Trial?

Question

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Answer 1

I'm trying to install a trial version of Adobe Photoshop CS5, but every time I try I get the following error in the Adobe Downlaod Assistant:
Error extracting the product installer (Error 101). Check for available disk space on your system and try downloading the product again.
I have two hard drives: the one my comp came with; which is where Windows is installed, and a second one on which everything else is installed and downloaded to. The latter is the one I'm trying to install PS to, and it has 59GB available, so I'm not sure why I'm getting this error. The other hard drive has 1.55GB available, and even that should be enough to install the program.
I looked in the install logs for Adobe and found this under summary:
WARNING: The payload: Adobe Photoshop CS5 Core  {7DFEBBA4-81E1-425B-BBAA-06E9E5BBD97E} requires a UI parent with following specification:
Family: Photoshop
ProductName: Adobe Photoshop CS5 Core_x64
This parent relationship is not satisfied, because this payload is not present in this session.
WARNING: OS requirements not met for {7DFEBBA4-81E1-425B-BBAA-06E9E5BBD97E}
WARNING: 1 ARKServiceControl::StartService: Service not started/stopped SwitchBoard. Current State: 0 Exit Code: 0 Service Specific Exit Code: 0
The second problem is what I think is causing the error. I'm runing Windows 7 32 bit. Does PS CS5 only work on 64 bit? I know it's that way with Adobe After Effects CS5, but I wasn't sure about PS.
Any help is appreciated.