The whole process means that you end up with a full copy of your harddrive and won't need to reinstall Windows when copying your clone over to a new harddrive. Although the software is Freeware, there's no adware bundled with the software. There's also an intelligent cloning option, which only copies over used space on the harddrive.
Sectors and partitions are copied over, along with key files such as boot.ini, NTLDR, BCD, winload.exe and MBR. A key feature of the software is the ability to clone a large disk to a smaller SSD drive. AOMEI Backupper is a disk cloning utility that's free to download and use.