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Looks like you've simply got DMA turned off.
That doesn't mean your hard drive isn't shot...clicking knocking sounds generally mean that the drive is toast. And it's possible that its the DMA commands that trigger the fault, so when you rebooted the DMA controller got back bad data from the drive and said "fuck this!" and stuck the drive in PIO mode. In PIO (programmed I/O) mode, the CPU has to take charge of managing every single solitary little bit moving to and from the drive. This takes a TON of CPU resources, which is why the system appears to "hang" when the drive is used.
You can try turning DMA back on (if the BIOS even will let you) by going to your device manager and looking at the properties for your primary hard drive controller. If your hard drive will only let you pick "PIO" mode, then you're probably screwed.
If it will let you switch back to DMA, you'll probably have to reboot, and naturally watch out for the clicking noises and stuff again.
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