Attempting to download 2017.1.1p1 with this command: Find-UnitySetupInstaller -Version '2017.1.2f1' | Install-UnitySetupInstance.
Installer gets to UnityExampleProjectSetup-2017.1.1p1.exe and installs fine. Noticed after this install the Unity install directory is overwritten with the example scene. Unity.exe is now deleted and thus the installation is now borked.

Attempting to download 2017.1.1p1 with this command:
Find-UnitySetupInstaller -Version '2017.1.2f1' | Install-UnitySetupInstance.Installer gets to
UnityExampleProjectSetup-2017.1.1p1.exeand installs fine. Noticed after this install the Unity install directory is overwritten with the example scene. Unity.exe is now deleted and thus the installation is now borked.