Open CV install Error - Numpy version incorrect

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Hi,

I tried to get Open CV up and running, but when I run importCV I get the following error

import cv2 RuntimeError: module compiled against API version 0xa but this version of numpy is 0x7

I'd followed the path to installing numpy so just picked up whichever version that was. Does Open CV work with a particular Numpy version, wasn't sure what Oxa stood for.

I'm using Windows 10 if that adds any complications to it either.

Cheers, Michael