I posted a Link to a USB to Servo controllor here but it got lost with the upgrade. So here it is again.
this is a link to
Phidgets They have a Servo controllor that plugs into a USB port for about $28us, you can controll it with simple code and use it in a startup script or shutdown script to open and close when the pc boots.
Servo's are not motors, they work on Timed pulses, This way you can position it precisley every time. If you put stright DC on one it may twich but you'll burn it up after a short time!.
Here's a link for the shutters....their not cheap ($100+ us)
Edmund Optics
Good Luck!
Crazybillybob