They may even declare the warranty void. Though in my humble opinion this isn't legal or at least not fair. Always have a backup of both the original configuration and your Linux installation if you have to get your laptop repaired. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and I was aware of a trademark claim, the designations have been printed in caps or initial caps.
All trademarks belong to their respective owners.