A Windows XP-era third-party application called xp-AntiSpy has made a comeback as a fork on Windows 11. The app, as the name suggests, was built with the goal of being an anti-spyware for Windows XP.
An unofficial WinPE seems to confirm that Windows 11 24H2 can run on unsupported CPUs as well. These are very early days though and we may need to wait for an official update from Microsoft. Update: ...