I was struggling for some time to resolve this installation error (which occurred in all CS4 trial versions I attempted to install, including the CS4 Master Collection) and found posts on these forums indicating that others were having a similar issue, even after lenghty technical support calls. Having now resolved this issue I thought I'd share my resolution with you.
For reference, my setup is Windows Vista x64 with Service Pack 1 and all other updates applied.
After much trawling through the installation log file I discovered that my installation was failing because CS4 was 'unable to find the folder at token named SharedDocuments' - which I assumed meant that Windows was not directing the installer to my Shared Documents directory, into which it presumably wanted to put the language packs.
I had previously moved the Public Documents folder to a different drive (as I do with all my special user folders - it's just common sense), and found that by recreating the C:\Users\Public\Documents folder the installtion proceeded without errors. However, the installer did not actually place anything in that folder (!) and having now deleted it again my CS4 trials seem none the wiser. Adobe developers please take note: avoid hard-coding special user paths into your installers and reference the relevant Windows registry paths instead.
Thus, my recommendation for anyone else suffering from this particular installation problem is to ensure that your Public Documents folder has not been moved from %SystemDrive%\Users\Public\Documents, and if so: recreate it at the original location - at least for the duration of the installation.
For reference, my setup is Windows Vista x64 with Service Pack 1 and all other updates applied.
After much trawling through the installation log file I discovered that my installation was failing because CS4 was 'unable to find the folder at token named SharedDocuments' - which I assumed meant that Windows was not directing the installer to my Shared Documents directory, into which it presumably wanted to put the language packs.
I had previously moved the Public Documents folder to a different drive (as I do with all my special user folders - it's just common sense), and found that by recreating the C:\Users\Public\Documents folder the installtion proceeded without errors. However, the installer did not actually place anything in that folder (!) and having now deleted it again my CS4 trials seem none the wiser. Adobe developers please take note: avoid hard-coding special user paths into your installers and reference the relevant Windows registry paths instead.
Thus, my recommendation for anyone else suffering from this particular installation problem is to ensure that your Public Documents folder has not been moved from %SystemDrive%\Users\Public\Documents, and if so: recreate it at the original location - at least for the duration of the installation.