Inno-Setup: Uninstall without admin permission

Question

Using Inno Setup, need that when a program is installed on the machine, by a user administrator, can be uninstalled by a default user. The parameter Privilegesrequired is as lowland, but the problem remains.

I’ve done tests on some machines here (All Windows 7), and on some machines I was able to uninstall the program using the default user, but there were other machines that did not allow and requested admin user.

I couldn’t identify a pattern of why it didn’t work on some machines and I couldn’t find anything with Internet searches either.

The directory in which the program is installed is C:\;

I am not using the [Registry] section and all parameters in the [Dirs] section use Permissions: users-Modify.