Please post your installation script and I will help you. We need to know if this solution was ever successfully built on ANY machine before we find out if your WIN setup file is corrupted, corrupted files causing incorrect DLLs or some kind of instability.
If the solution never left this system and was successfully built at some point, then you may have legitimate files in your mailbox, but a temporary folder in the MS.Net Framework folder containing the wrong files (but let's not go there yet).
You mentioned that you are already in the release, so some questions:
(1) Was this solution pulled from another machine with the Windows Visual Studio SDK installed?
(2) Was this solution built using the command line builder?
(3) If the solution was moved, were there any other packages that complained during the recovery but were not on the error list above? (For example, it can only be displayed on the output).
(4) When you are in the Installshield user interface, do you see any missing dependencies?
Please make sure that you have completed the package recovery phase when the solution was downloaded.
I recommend installing the Visual Studio SDK to find out if you have additional hints or a narrow problem.
To clarify, checking for fixed package errors and installing the SDK are important troubleshooting steps based on what you have told us so far.
The next logical step is to confirm the dependencies on the scan during assembly and / or any restored packages that were correctly restored, so you can narrow down this long list of complaint packages (which just confuses the IMHO question).
I almost do not want to mention this, because it is rather a workaround, depending on whether you have ever had a successful development of this system, but if it gets worse, you can use the Installshield interface to add the latest DLL to your obj \ Free folder and create again.
The paid version had a fully working sample project, but I did not use installshield after a couple of years.