How would I go about doing this?Richie's advice is on-point. Windows installs are not meant to be modular in this way unless you have a very specific Windows-to-Go install. While it can work, there's a chance it won't work at all or that you're chasing gremlins for a year. Best practice is a full reinstall with a platform change.
How would I go about doing this?A full reinstall of the OS is almost universally recommended to avoid issues both small and large.