Be sure you are administrator and be sure you hit apply, not just OK.
When I right click the 'C' drive and turn off sharing, it doesn't stay turned off. Is there a way to get it turned off permanently. My virus program suggested me turning off sharing on 'C' drive and to put a password with Administrator. I was getting reports every day with them detecting virus worms. The password worked as I don't get them anymore. Maybe the sharing is turned off too but under Preferences it shows sharing the next time I log on.
Thanks for your help.