'Failed to apply network settings' error during boot

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http://askubuntu.com – When I restart my computer I found a strange error related to blue-tooth. Error is : Failed to apply network settings org.freedesktop.DBus.Error.Spawn.PermissionsInvalid: The permission of the setuid helper is not correct You might not be able to connect to the Bluetooth network via this machine. My system is dual boot. One OS is ubuntu 12.04 and another is windows 7. When I used to shutdown my system from ubuntu I am getting ubuntu login screen. Also I am unable to see the another drives of hard disk in ubuntu. Also If I insert the pendrive I have to mount it using command line. otherwise (HowTos)