windows - Privileges/owner issue when writing in C:ProgramData

Question

As pointed out in Writing config file in C:Program Files (x86)MyAppmyapp.cfg, vs. Administrator privilege, it is not a good idea to write a config file in C:Program Files (x86)MyAppmyapp.cfg.

Instead of this, my software now saves its data in a subdir of %ALLUSERSPROFILE% (ex : C:ProgramDataMyAppmyapp.cfg on Win7)

[I use myfile = open(filename, 'a') in Python to do this.]

I now encounter an issue about this file :

• I installed the software with User A, and ran it, then the file C:ProgramDataMyAppmyapp.cfg was written.
• Then, I changed user to User B, and ran my software again : now an error is displayed : User 2 has no right to write in C:ProgramDataMyAppmyapp.cfg (Permission denied).

Why? Isn't %ALLUSERSPROFILE% a place that can be written by all users? How to solve this problem ?

question from:https://stackoverflow.com/questions/22107812/privileges-owner-issue-when-writing-in-c-programdata