Windows Installer prompts on each launch of application

[Thomas Weise]

Hello,
I'm distributing a small app as MSI file.
Since the last generation of the installation file, the Windows Installer
prompts "Preparing Installation" every time when the user launches my
application.
This is not really a problem, but embarassing. Does anybody have an idea
how to stop this?
Thanks,
Thomas

 

[Thomas Weise]

With external help, I could fix the problem:

During installation, a folder named tmp was created.
A dummy file was placed there because I was not aware of option
"AlwaysCreate".
On exiting the app, the dummy file was deleted together with all temporary
files.
On relaunching the app, Windows Installer detected a "corrupted"
installation and re-installed the app.