>>Michael, why not have the launcher copy the new runtimes into a work directory.
>>Then use the runonce registry setting to copy the new runtimes during a reboot.
>>You could also force a reboot use any of the shutdown api's lying around.
>
>What a grand idea, thanks!
>One of our staff programmers who says his job title is "Professional Software Installer" would like to buy you a drink.

A better idea would be to put a Setup Wizard runtime install out on the network and use the same approach (a runonce key) to actually run the Setup Wizard installation; this ensures that files are copiued into place properly and registry entries are updated, etc.