While Windows 11 still requires that your PC support TPM 2.0, there is a workaround for computers without the required hardware, and Microsoft itself has offered up the solution.
Long story short, TPM (Trusted Platform Module) is a technology that protects your computer’s data. An upgraded TPM means upgraded security for Windows 11 users. However, while many PCs support TPM 2.0, not all of them do. There is now an official solution. As PC Gamer reported, Microsoft published a tutorial on its support page outlining how to install Windows 11 on a machine without TPM 2.0.
Microsoft clarifies in the tutorial that it does not recommend installation on any PC that does not meet the requirements. It also encourages customers to reach out to support before trying any installation method other than the standard route. Your PC will still need to support at least TPM 1.2. With that in mind, here is the method it described.