From your screenshot, it looks like your WD drive is using the CPU resources (97%!!!) to transfer files. This means your HD is not in UDMA mode, and instead, it's using PIO. Check your device manager, into the properties of your primary IDE channel (or secondary, wherever you installed it to) and see what mode its running in. You also need to make sure its jumpered correctly, and the cable (black end is master, and grey end is slave). Another tip is never put a 7200rpm alongside a slower hard drive on the same cable otherwise it operates at the slower hard drive's speed.