To mirror your Windows computer to another computer, you will need AirParrot 3 in addition to Reflector 4.
Follow the steps below to mirror your Windows computer to Reflector 4:
Be sure your computer is on the same network as the computer that has Reflector 4 installed.
Launch Reflector 4 on the computer you wish to mirror to.
On the computer you wish to mirror, you will need to install and launch AirParrot 3.
Locate the AirParrot 3 icon in the PC's task bar in the lower right-hand corner by the clock and select it.
Clicking the AirParrot 3 icon will present a list of available receivers.
Select the computer running Reflector 4.
Your screen will begin mirroring.