One more limitation: User Accounts -> Manage Accounts -> Add a new user in PC settings . Same error, Explorer.exe Function not implemented. Again, not a big problem, but I think it is good to know the limitations of the software.
I dont have tested with the original explorer.exe but I think I have found a bug / limitation with bluetooth. If I double click in the bluetooth icon, it show an error. Add / Show (and probable allow) a bluetooth device shows the same error. Sorry for my bad english.