What does the MSI property/value "REINSTALL=ALL" do, and why do some patches (MSP's) require it?
I understand it from the perspective of its usage with the
msiexec /p command, however I don't understand what it is doing under the hood. For example, is it taking all files from the patch and forcing any of its later files (e.g. DLL's) to overwrite what already exists?
Edit: Also, does REINSTALL=ALL look at the Version of the file or the Date Created or Date Modified of the file, to determine which one is newer?