Logon screen problems

So recently I booted into windows, and when the desktop loaded it was suddenly on the windows classic theme.
So I rebooted and everything was fine after that, except the logon screen which now uses the windows classic pointer theme (which changes back to aero when I log in) and the options menu when clicking the arrow on the shutdown button is the classic theme.
It's not too much of a problem but it's just annoying
Any ideas?