I am having a similar problem to others here. I am able to download the installer from viveport.com using the Download button at the top right. I run vivesw.exe as administrator, and set firewall exceptions for the Vive identity authenticator, but I still get hung up at the beginning of the install when it asks me to sign in. I click sign in, the icon greys out for about a minute, then goes to blue again. No additional dialogs appear, foreground or background.