Problem: P2 Server Setup Wizard ended prematurely
Description: During installation, a message appears stating that the wizard has ended prematurely. Installation is not completed.
Cause: In Windows Server 2012, User Access Control does not correctly elevate privileges.
Resolution: If you are running the installer as a user other than the local machine administrator account (i.e. if you are not logged in as Administrator), you need to execute the installer from Powershell with "Run as Administrator" privileges.
Assuming that the installer is located in the directory that the command is being run from, the command should be similar to:
msiexec /i "P2 Server 4.4.0.68 Setup.msi"
It can also be invoked with a fully qualified path:
msiexec /i "C:\temp\P2 Server 4.4.0.68 Setup.msi"