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?