How to mirror Lumia 800 (WP 7.8) screen on PC

i can mirror iPad2 by AirPlay,
i can mirror Android using MirrorOp Sender / Receiver,
I can mirror PC Screen on Adroid using MirrorOp,
Unable to Mirror my Lumia 800 (WP7.8) on PC..

WP7 doesn't support the feature. It was introduced with WP8.1, which you can't upgrade to.