Description:
------------
When I run the following script as a user with administrator rights, everything works like a charm. When I remove the user from the administrators group and leave it in a users group, the script does not work. (please ignore the syntax as it works fine as under the admin user account)

Note that: 
I can run simple command lines like ?dir? from any windows account.
The permissions have been set to allow every user group to have full control on the following:

cmd.exe
convertDoc.exe
hello.doc
tmpuploads/

what are some security settings that I can enable for exec to allow the users account to run the script?


Reproduce code:
---------------
function runfileconvertion(){

$convert_cmd = "C:\\\"Program Files\"\\\"SoftInterface, Inc\"\\\"Convert Doc\"\ConvertDoc.exe /S C:\\\"Program Files\"\\\"Apache Group\"\Apache\webroot\createdoc\\tmpuploads\\hello.doc /F9 /T C:\\\"Program Files\"\\\"Apache Group\"\Apache\webroot\createdoc\\tmpuploads\\hello.txt /C4 /M1";

exec($convert_cmd);

}

runfileconvertion();

Expected result:
----------------
i expect for a new hello.txt file to be created

Actual result:
--------------
nothing at all, no error