Same problem, except I'm running Win 8.1. Just checked Windows updates to see if I could uninstall any from 7/23, and it appears all recent Windows updates have failed anyway. And the beta works as normal. So it's not a Windows problem, it seems to be a patch problem.
Specifically, when running Homecoming from Tequila, the Loading bar has a green border around it. Before login screen appears, a small green square is visible in upper left corner of my screen. After login screen has loaded, clicking on anything (password line, exit, start, etc) has no effect. I can tab to password line, enter password and press enter, but nothing happens.
I've set the associated files/folders to trusted/whitelisted in both Comodo Firewall and Avast Antivirus, and have tried deleting Tequila from my registry.
Any suggestions or updates on the issue are appreciated.