[SteamUi.dll missing]

So it turned out that everything installed correctly even though the installer never finished. Anyway, all good on my end now, just a weird installer error to have.

[SteamUi.dll missing]

I am getting the same error. It appears that the Vive Setup is trying to install steam, but it is already installed. The directory structure is correct as far as where steam is installed. Steam when running crashes when Vive setup tries to reinstall it. The installer still fails with the same error if Steam is not running when the Vive setup is run. It throws the error Could'nt install Steam thereafter. Thanks for your help.