I was having problems installing Photoshop CS3 on Win7 32bit. Shared components installed, all others failed.
I was installing logged in as administrator, and I was right mouse clicking on the setup.exe and selecting Run as Administrator. UAC is disabled. The installer is located on a Network volume.
I copied the whole directory from the network volume to a folder on my desktop and ran the setup.exe from there. It installed without problems.
Not sure this will help anyone else, but thought I would share.
