did fw work previously to open psd files? - no, only admin users can open psd files wiht fw or ps.
do you see that error with all psd files? - yes, all psd files give this error, no error given jpeg or png files
are those cs6 psd files? - yes.
what happens if you right click fw>click 'run as administrator'? - same error.
i have to give local administrator rights to users that they can work with psd files.
yes, you are right but which windows permissions need adobe cs products? what is the workspace of programs or which folders,files need permissions(write,special etc) to open psd or fw files.
i think ps or fw uses an workspace (temp folder or hidden folder) that normal users dont have write permission there or something like that
when i start to open a psd file, which windows folder or area using by fw and ps. there is a difference opening a psd file between opening jpeg,png etc.
<moved by mod from downloading,installing,setting up - kglad>