The at-home TOEFL now requires Windows 11. It can no longer be taken on computers running Windows 10. The presence of that operating system now causes the at-home TOEFL’s equipment check to fail. This change was made sometime after January 13.
In the short term, I suppose this could impact the popularity of the test, as there are still quite a few Windows 10 users. That operating system is still widely used in some key South Asia markets, where the at-home TOEFL is pretty popular. It is also widely used in South Korea, which remains a key market for the test.
The Duolingo English Test and the PTE Express test can still be taken on Windows 10. Same for the IELTS Online test.
(You can also use a Mac, of course)