when I right click the time near the windows notification area, and click adjust date/time and click change date and time I get an error message saying 'Unable to continue you do not have permission to perform this task. Please contact your computer administrator for help'

Go to your control panel click user accounts and family safety then once your in there click user accounts once in there click turn user account control on and off. then uncheck the box and apply restart your computer and it should work.

You can reapply the UAC after you have updated your time as it should keep working from now on.