Unable to log you into GeForce NOW

Login Failed. We were unable to log you in at this time. Please return to the GeForce NOW app on your device and try again. In the GeForce NOW app you get the Login Unsuccessful.

When you press retry it opens the browser but still fails to login.

Solution

Open CMD in Administrator

netsh winsock reset

Then restart you PC.

Solution for failed update

The failed login could also be due to a pending update. If the update failed then download the installation from Nvidia site: https://download.nvidia.com/gfnpc/GeForceNOW-release.exe