Try checking both:
Use regedit to go to the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.
Create a DWORD entry namedHideFastUserSwitchingand set its value to 0.Type Group Policy in the Start Screen and then click on the Settings category. Click on the Edit Group Policy option and under the Local Computer Policy expand the tree to the following path:
Computer Configuration\Administrative Templates\System\Logon.
Double-click on Hide entry points for Fast User Switching, select Not Configured and then click on OK. Then open the Run dialog box and enter the commandgpupdate /forceand click OK.
For both methods, try rebooting if they don't work at first. It would be interesting to know if the above settings existed already on your computer.