I wish I had found this out with the free trial, rather than going ahead and buying the full versoin. I am running Windows 8.1 on a Sony VAIO Duo. When I run the app I get the login screen, enter credentials, and the receive "An unknown error occurred during login. Please try again."
I called Support- their response was to uninstall, reboot, reinstall.
Still gets the same error. The response from Support was that there is nothing wrong with the app.
I can login to sling.com and connect to my slingbox, watching through a web browser on the same computer. The Windows 8.1 app does not work, and Support tells me it's my problem.
Please fix this.