I am also having a problem with Viveport, but earlier in the chain.
After selecting the location for the installation of the Vive software, and clicking install, the application hangs.
This happens if I use the default directory or not. I have noticed that an 'Updater' vive application starts, but doesn't do anything (even after leaving for 30 mins).
If i try running the Viveport installer again (with the Updater still running), the install fails immediately with a "Couldn't download Vive Software" error. If I kill the updater app and start again, the system hangs again.
I have tried running without anti-virus / firewall and as Admin, but no difference.
Looking at the log file in the ViveSetup folder, the last line in the log is always:
" [Downloader] Register updater: "C:/Program Files (x86)/ViveSetup/Updater/Updater.exe" "-install VIVE Software C:\\Program Files (x86)\\ViveSetup" (D)"
I am using Windows 10 64bit professional edition, Steam is working correctly and VR seems to be running flawlessly. Anybody got any suggestions?