"The operating system is not adequate for running [app]". Obviously Windows 7 x64 is adequate, but how do we get round this problem?
The simplest of all options is to right click the MSI and on the Compatibility tab tick the box "Run this program in compatibility mode for: Previous version of Windows". However, knowing that this is probably just a spurious error, I wanted to patch the MSI so that I don't need to worry about this condition in the future.
Launching Orca I can see straight away there is a LaunchCondition set that will probably be causing the issue-
(Version9X = 400) OR (Version9X = 410 And Not WindowsBuild = 2222) OR (Version9X = 410 And WindowsBuild = 2222) OR (Version9X = 490) OR (VersionNT = 400) OR (VersionNT = 500) OR (VersionNT = 501)
I could just remove the condition and save the modified MSI, but I always prefer to leave the MSI intact and create a transform file. So, from the Transform menu choose New Transform. The title bar will change to say "[app].msi (transformed by Untitled)".
Right click the row we want to delete and choose "Drop Row"
A green line should now appear through the row. From the Transform menu choose Generate Transform and save the mst file in the same folder as your MSI. I called mine platformfix.mst.
Now try installing the app. To check the transform is working, run the MSI without the transform, then with the transform. This command should return the original error-
msiexec /i Plastics.msi
Whereas this should bypass the version check-
msiexec /i Plastics.msi TRANSFORMS=platformfix.mst