First you have to remove the harddrive from the laptop, (do you know how to do that?) And then use the adapter to connect it to another computer, then copy everything across, and then reinstall windows and restore your data.
Basically to backup the data, you just go into windows explorer and copy everything from one drive to the other. If you have the space, copy everything over.
If this is what you want to do, then I can get some instructions together to make it easier. Just let me know if you know how to remove the harddrive, and if you have the space to copy everything, or just enough space to copy over the data files.