I'm not too familiar with cloning drives, but do you have a 3rd drive you can back everything up to then swap the drives? Install Windows then move everything in place?
Is your parent's computer an off the shelf model or home made? If it's off the shelf, it may have an OEM copy of Windows. I've heard they're sometimes tied to the hard drive, so moving it around might mess things up.
When are you getting the SSD? Could you just wait? Also, noisy hard drives are sometimes an indication of failure coming soon. Might not be good to pop that in your parent's PC.
Already got the ssd. I have my os on there and my home folder on the other drive. I don't have a third drive (sold all my drives thinking I would buy a new one, then bam. Hard drive prices skyrocket) so I can't back everything up.
It was off the shelf but I made them buy a windows 7 copy off new egg when it came out. I don't have the windows 7 anymore which is why I need to clone it.
If the hard drive fails. It could be a good thing. They would have no idea I took the drive and I can have them buy a new one. Everyone wins. They can afford them, I cant!