PlinyElder wrote: I do this same thing with our DataConnectionString, i encrypt the string, save it to the registry and then upon upgrade pull that string back in, decrypt and set the installer properties. Then the user doesnt have to re-enter them. Also works well for the silent installs in MSI projects In my case, I have an application which has a service. What if the user sets an account credential from its properties. Now, If he wants to upgrade to newer version which I am building how can I make sure that those service credentials will be retained after the upgrade? As of now while testing I can see those credentials are getting disappeared. In this case, everytime user upgrades to newer version he needs to put credentials again. ... View more