I have a little USB inspection camera that I need to use with my Surface Pro 3, which has windows 8.1 installed.

(the built in cameras are no use because I need to see into an enclosed space)

I have the camera plugged into the USB port on my computer, the light on the camera is on, and it is showing up as USB camera in the device list.   But ... I have no idea how to view it?
http://www.geekzone.co.nz/forums.asp?forumid=50&action=new_disc_topics
I've searched on GZ and the web but I can't find how.

I sure this is really simple but it isn't at all obvious.

I bought the camera from JayCar.  They offer a software download, but the file has an ".rar" extension that windows doesn't recognise.  I suspect I need to unzip this file?

http://www.jaycar.co.nz/CCTV-%26-Surveillance/CCTV-%26-Surveillance-Monitors/Installer/CAM-INSPECTION-BUDGET-USB-2-25M/p/QC3373