More ways of confusing the firmware on some Samsung laptops in UEFI mode to the extent that they will no longer boot are being discovered. It appears that even some Windows applications are able to trigger the problem.
You just think that's a Chromebook beckoning you with an open source OS, easier upgradeability and fast connections to the cloud. All those qualities could make it a Linux netbook in disguise -- or at least what the netbooks of a few years ago promised.
Matthew Garrett calls out Google for not allowing users to install their own keys on Chromebook systems. "Some people don't like Secure Boot because they don't trust Microsoft. If you trust Google more, then a Chromebook is a reasonable choice.