For running Windows 11, Microsoft says TPM 2.0 support is necessary due to security reasons. However, in its document, the firm says this criterion, with prior approval, is relaxed for « special » PCs.
When announcing its Windows 11 requirements, Microsoft made it clear that a Trusted Platform Module (TPM) chip or a Firmware-based Trusted Platform Module (fTPM) of 2.0 standard is mandatory for running the OS. While the company had initially settled on a slightly more lenient TPM version 1.2, it later changed the requirement list to make TPM 2.