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Microsoft introduced a hardware compatibility requirement for Windows 11 in 2021, mandating the Trusted Platform Module (TPM) 2.0 standard. A TPM is a secure cryptoprocessor designed to manage security-related tasks and encryption keys, enhancing system security by encrypting data, generating random numbers, and validating digital signatures. The TPM architecture is defined by the ISO/IEC 11889 standard. TPM can be integrated as a chip on a motherboard or within firmware, with major companies like Intel, AMD, and Qualcomm adopting this technology. TPM 2.0 is essential for Windows security features, working with Secure Boot to ensure only trusted code is executed at startup and facilitating biometric authentication through Windows Hello. It also secures BitLocker keys, making unauthorized data access difficult. Most PCs manufactured from 2016 onwards include TPM 2.0 by default, while older systems may have limited TPM capabilities or adhere to the unsupported TPM 1.2 standard. Users can check their TPM status using the System Information tool. TPM functionality is not exclusive to Windows; it is also utilized in Linux PCs and IoT devices, while Apple devices use a different architecture called Secure Enclave. Windows 10 and 11 automatically initialize the TPM during installation, and users can upgrade to Windows 11 with any version of TPM through a registry modification.