Of course sometimes the program writes directly the configuration in the system registry. In those cases i take a command to remember me I must have a security copy of a branch or key in the windows registry. .....
how do you know if an install has changed the registry? Is there a software that does that? (I'm sure there is...)
I usually search in the registry the common registry keys for that program.
I try to observ during the installation if the program writes something in other place than desktop or the portable installation directory.
Then i post is not perfect portable.
Or even if need additional software like framework.
I have no memory, but I think i have an utility to detect changes in the registry
That's the point.
I think your observation is very interesting and i would like to know the answer.
So i will post anothec thread about this