Ok some more information I don't know why I didn't think of this before. I ran the logging option of msiexe as follows (as administrator for cmd.exe):
First: In file explorer copied the downloaded from apple iCloud64.exe (I'm running Windows 10 x64) into C:\Temp (which I previously made in File Explorer)
Second: Make sure outlook is not running. (for some reason applies needs this to happened, don't care its not running)
Then
1. Start -> search -> "cmd.exe" (no quotes)
2. Right click on it in when it shows up in returned values select "Run as administrator"
3. type in "cd\" (no quotes) and press the enter key
4. Type "cd C:\Temp" (no quotes and press the enter key
5. Type "msiexec /i C:\temp\icloud64.msi /l* C:\temp\iCloud64.log" (no quotes)
Of course installation failed again and I got same meaningless error message in the message box which is not oh so helpful. But now I have log. Much of it is just blah blah blah, but at the bottom it says:
Property(S): SOURCEDIR = C:\temp\
Property(S): SourcedirProduct = {ADFDB647-35C0-4254-9EE6-2D9C3B7104BD}
Property(S): ProductToBeRegistered = 1
Property(S): MsiRebootActionScheduled = 1
Action ended 15:27:18: ExecuteAction. Return value 3.
Action 15:27:18: SetupCompleteError.
Action start 15:27:18: SetupCompleteError.
DEBUG: Error 2836: The control Back on the dialog SetupCompleteError can not take focus
The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2836. The arguments are: SetupCompleteError, Back,
Action 15:27:18: SetupCompleteError. Dialog created
Action ended 15:27:22: SetupCompleteError. Return value 2.
Action ended 15:27:22: INSTALL. Return value 3.
Property(C): UpgradeCode = {566820C0-2E69-11E0-821D-5609DFD72085}
Property(C): OUTLOOK64_2010_BITNESS = x86
Property(C): OUTLOOK32_2010_BITNESS = x86
Property(C): MS_MEDIAFEATUREPACK_INSTALLED = 12.0.10586.162
Property(C): ChkOptASU = 1
Property(C): InternetServices64Folder = C:\Program Files\Common Files\Apple\Internet Services\
Property(C): INSTALLDIR = C:\Program Files (x86)\Common Files\Apple\Internet Services\
Property(C): INSTALLERCACHE = C:\ProgramData\Apple\Installer Cache\iCloud Control Panel 5.2.1.69\
=== Logging stopped: 5/20/2016 15:27:22 ===
MSI (c) (94:3C) [15:27:22:983]: Product: iCloud -- Installation failed.
MSI (c) (94:3C) [15:27:22:983]: Windows Installer installed the product. Product Name: iCloud. Product Version: 5.2.1.69. Product Language: 1033. Manufacturer: Apple Inc.. Installation success or error status: 1603.
