Error:
Error: “The System Administrator Has Set Policies to Prevent This Installation”, when trying to install a software.” When trying to install an MSI on a server.
Solution
Browse the registry to HKLM\Software\Policies\Microsoft\Windows\Installer
Create: DisableMSI Type: REG_DWORD value = 0 (0 should allow you to install it was originally 1)
Install your MSI.