I have not tested it, but I would think that if the dotnetframwork install was out of date, it would not install over top of a newer version.

>Sorry, this is not an answer, but another question:
>
>What happens if later on your users download a newer version of the dotnet framework? Or their windows updater does it for them. Will your app work with the newer version (assuming yes)?
>
>
>>I need to install my VB.NET app on Win2000 Professional PC's that do not have the dotnet framework installed. Inorder to make this as seemless and easy as possible, I want to run the dotnetFramwork install exe as a preinstall executable in my installshield setup. Is this possible?