(And you didn’t adjust your registry to manually go around any hardware block.) Instead, you were offered the upgrade because your PC had the right processor, TPM chip, and other necessary items. Let’s assume first that you didn’t use the Insider program to get Windows 11. The answer depends on how long ago you installed Windows 11 and how you did so. Can you uninstall it without having to reinstall your old operating system from scratch?
So, you’ve installed Windows 11, kicked the proverbial tires and taken it for spin - and now you want to go back to tried and trusty Windows 10 until the new-OS dust settles.