Brand new free account on a MAC trying to access my sister's PC which is Windows. Both of us on the phone together. I entered her ID and her password. It tells me password is wrong and will never authenticate. Tried multiple time and even tried refreshing the password with a new one. What am I missing? I do know that during her install she didn't have to explicitly grant any access to her local machine like I did during my MAC install. Was a step maybe missed?