Network Camera and PC Setup

I've recently bought a Network camera to play around with. It's a D-Link DCS-900 wired ethernet type.

It came with a viewing software called IPView Lite. I have noticed that with this program, when viewing live video, the CPU usage is very high, at almost 100%. This happens when I view on any of the PC's on the network.

I am thinking of having a PC based CCTV setup using network cameras, where the video is recorded onto the hard drive.

A few questions:

1. Is it normal for high CPU usage with IP Cameras and IP camera viewing software?

2. Will I need a high powered or high performance PC setup?

3. Is there other software out there that can be used with my D-Link cameras?

4. Do I need a dedicated PC just for use with the CCTV setup?


All comments or suggestions appreciated.

Thanks