When I go to install a web setup/deployment project either through the vs2003 IDE or using the msi file on my machine or any machine, I get the following error immediately before clicking any buttons:
The installer was interrupted before [project] could be installed. You need to restart the installer to try again.
Please note the following:
I *can* run deployment projects for windows forms in VS2003 and I *can* run deployment projects for windows forms and web apps in VS2005
This problem occurrs regardless of the machine I try to deploy to.
I have reinstalled vs2003 (did not help)
This is a recent problem - I have had VS2005 and VS2003 on the same machine for months with no trouble.
I did recently install Web Deployment Projects for VS2005. I thought that might be the problem so I uninstalled that and reinstalled VS2003. Again no help.
I would be happy to post an MSI log on this forum if anyone out there thinks they might be able to help.

Can No longer deploy VS2003 Web Projects
David Yeo
SOLVED:
http://www.eggheadcafe.com/forumarchives/vsnetsetup/Jan2006/post25097....
Basically the file "C:\Program Files\Microsoft Visual Studio .NET 2003\Common\Tools\Deployment\dpca.dll" had somehow been upgraded from version 7.10.3077.0 to 7.10.3077.1. The author of the above referenced link spoke only of modification dates - the file size and creation dates were identical, but the modification dates were different. Anyway I grabbed the 7.10.3077.0 version from my laptop and replaced it on my main machine and that solved the problem. I only hope this thread will help someone else out in the future.
Bob
PS Kinda miffed that the Visual Studio "repair" option didn't replace that dll for me.