So, I've read Microsoft's documentation, and it ends up being a lot of words that don't explain anything. I've seen other places of people using DISM commands, but it doesn't explain what they do.
I know DISM is used for working with images before deployment, but people are using it for repairing a running instance of Windows. How exactly does it do that? Does it use some files from SxS?
What about when Windows does a "Refresh" or "Reinstall", does it use something similar or some files from a recovery partition?