In the last two years I have needed to do a clean re-install of Windows on two of my laptops. It could have been worse, but I had backups of most of my important data files - tax files, spreadsheets, word documents, etc. It isn't my idea of having a fun time, much easier to just swap hard drives. The main hesitation I had with using DiskGenius is that it is Chinese, but it had lots of good reviews. I doubt the Chicoms would have much interest in anything I have on my HDs. DiskGenius Free Edition - Free Partition Manager for Windows

Additionally, DiskGenius will also allow you to migrate a copy of your operating system to a bootable USB drive or SD chip. So if you ever have a problem logging into your Windows, you can always boot up using the portable drive. All you need to do is change the boot order in your BIOS.