I know how to tell the registy to run my app on startup. There are a lot of threads about it. I used this one: How do I set a program to launch at startup. The problem I face is: I give the user the option to disable/enable this option when the user uninstall, there is a key left in the registry that tells the app to run (although the app was already uninstalled)
I know I can handle it by a shortcut in the startup folder, but I tried it already and I have problem with it too. Thanks Eli