ive had this what a pain, leme do some reading, but ultimatly i had to get into steam and then deactivate that nonsense.

edit. ok from what i remeber, i had to wait practically a day to get that authorisation but... i did manage to get in. in the steam help website there an area that explains what to do. im sure i deleted alot of the steam files, not folders, then update it and somehow i got back in before those emails krept in