You can upgrade your old PC to Windows 11 - even if Microsoft says it's 'incompatible'. Here's how

If you're willing to perform a clean install of Windows 11, you can boot from installation media and run Windows Setup. That option skips the CPU compatibility check completely.

You need to make one small change to the Windows registry, as documented in this Microsoft support document. This change tells the Windows 11 Setup program to skip the check for compatible CPUs and to allow installation on a PC with an older TPM (version 1.2).

Read at ZDNET